diff --git a/src/dsp/lossless.h b/src/dsp/lossless.h
index df3da8ce..d9d821e3 100644
--- a/src/dsp/lossless.h
+++ b/src/dsp/lossless.h
@@ -167,26 +167,20 @@ void VP8LBitEntropyInit(VP8LBitEntropy* const entropy);
 // Get the combined symbol bit entropy and Huffman cost stats for the
 // distributions 'X' and 'Y'. Those results can then be refined according to
 // codec specific heuristics.
-void VP8LGetCombinedEntropyUnrefined(const uint32_t* const X,
-                                     const uint32_t* const Y, int length,
-                                     VP8LBitEntropy* const bit_entropy,
-                                     VP8LStreaks* const stats);
+typedef void (*VP8LGetCombinedEntropyUnrefinedFunc)(
+    const uint32_t X[], const uint32_t Y[], int length,
+    VP8LBitEntropy* const bit_entropy, VP8LStreaks* const stats);
+extern VP8LGetCombinedEntropyUnrefinedFunc VP8LGetCombinedEntropyUnrefined;
+
 // Get the entropy for the distribution 'X'.
-void VP8LGetEntropyUnrefined(const uint32_t* const X, int length,
-                             VP8LBitEntropy* const bit_entropy,
-                             VP8LStreaks* const stats);
+typedef void (*VP8LGetEntropyUnrefinedFunc)(const uint32_t X[], int length,
+                                            VP8LBitEntropy* const bit_entropy,
+                                            VP8LStreaks* const stats);
+extern VP8LGetEntropyUnrefinedFunc VP8LGetEntropyUnrefined;
 
 void VP8LBitsEntropyUnrefined(const uint32_t* const array, int n,
                               VP8LBitEntropy* const entropy);
 
-typedef void (*GetEntropyUnrefinedHelperFunc)(uint32_t val, int i,
-                                              uint32_t* const val_prev,
-                                              int* const i_prev,
-                                              VP8LBitEntropy* const bit_entropy,
-                                              VP8LStreaks* const stats);
-// Internal function used by VP8LGet*EntropyUnrefined.
-extern GetEntropyUnrefinedHelperFunc VP8LGetEntropyUnrefinedHelper;
-
 typedef void (*VP8LHistogramAddFunc)(const VP8LHistogram* const a,
                                      const VP8LHistogram* const b,
                                      VP8LHistogram* const out);
diff --git a/src/dsp/lossless_enc.c b/src/dsp/lossless_enc.c
index 730c9326..932f7ec6 100644
--- a/src/dsp/lossless_enc.c
+++ b/src/dsp/lossless_enc.c
@@ -453,9 +453,9 @@ static WEBP_INLINE void GetEntropyUnrefinedHelper(
   *i_prev = i;
 }
 
-void VP8LGetEntropyUnrefined(const uint32_t* const X, int length,
-                             VP8LBitEntropy* const bit_entropy,
-                             VP8LStreaks* const stats) {
+static void GetEntropyUnrefined(const uint32_t X[], int length,
+                                VP8LBitEntropy* const bit_entropy,
+                                VP8LStreaks* const stats) {
   int i;
   int i_prev = 0;
   uint32_t x_prev = X[0];
@@ -466,18 +466,18 @@ void VP8LGetEntropyUnrefined(const uint32_t* const X, int length,
   for (i = 1; i < length; ++i) {
     const uint32_t x = X[i];
     if (x != x_prev) {
-      VP8LGetEntropyUnrefinedHelper(x, i, &x_prev, &i_prev, bit_entropy, stats);
+      GetEntropyUnrefinedHelper(x, i, &x_prev, &i_prev, bit_entropy, stats);
     }
   }
-  VP8LGetEntropyUnrefinedHelper(0, i, &x_prev, &i_prev, bit_entropy, stats);
+  GetEntropyUnrefinedHelper(0, i, &x_prev, &i_prev, bit_entropy, stats);
 
   bit_entropy->entropy += VP8LFastSLog2(bit_entropy->sum);
 }
 
-void VP8LGetCombinedEntropyUnrefined(const uint32_t* const X,
-                                     const uint32_t* const Y, int length,
-                                     VP8LBitEntropy* const bit_entropy,
-                                     VP8LStreaks* const stats) {
+static void GetCombinedEntropyUnrefined(const uint32_t X[], const uint32_t Y[],
+                                        int length,
+                                        VP8LBitEntropy* const bit_entropy,
+                                        VP8LStreaks* const stats) {
   int i = 1;
   int i_prev = 0;
   uint32_t xy_prev = X[0] + Y[0];
@@ -488,11 +488,10 @@ void VP8LGetCombinedEntropyUnrefined(const uint32_t* const X,
   for (i = 1; i < length; ++i) {
     const uint32_t xy = X[i] + Y[i];
     if (xy != xy_prev) {
-      VP8LGetEntropyUnrefinedHelper(xy, i, &xy_prev, &i_prev, bit_entropy,
-                                    stats);
+      GetEntropyUnrefinedHelper(xy, i, &xy_prev, &i_prev, bit_entropy, stats);
     }
   }
-  VP8LGetEntropyUnrefinedHelper(0, i, &xy_prev, &i_prev, bit_entropy, stats);
+  GetEntropyUnrefinedHelper(0, i, &xy_prev, &i_prev, bit_entropy, stats);
 
   bit_entropy->entropy += VP8LFastSLog2(bit_entropy->sum);
 }
@@ -680,7 +679,8 @@ VP8LCostFunc VP8LExtraCost;
 VP8LCostCombinedFunc VP8LExtraCostCombined;
 VP8LCombinedShannonEntropyFunc VP8LCombinedShannonEntropy;
 
-GetEntropyUnrefinedHelperFunc VP8LGetEntropyUnrefinedHelper;
+VP8LGetEntropyUnrefinedFunc VP8LGetEntropyUnrefined;
+VP8LGetCombinedEntropyUnrefinedFunc VP8LGetCombinedEntropyUnrefined;
 
 VP8LHistogramAddFunc VP8LHistogramAdd;
 
@@ -715,7 +715,8 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInit(void) {
   VP8LExtraCostCombined = ExtraCostCombined;
   VP8LCombinedShannonEntropy = CombinedShannonEntropy;
 
-  VP8LGetEntropyUnrefinedHelper = GetEntropyUnrefinedHelper;
+  VP8LGetEntropyUnrefined = GetEntropyUnrefined;
+  VP8LGetCombinedEntropyUnrefined = GetCombinedEntropyUnrefined;
 
   VP8LHistogramAdd = HistogramAdd;
 
diff --git a/src/dsp/lossless_enc_mips32.c b/src/dsp/lossless_enc_mips32.c
index d79a6d92..4186b9f5 100644
--- a/src/dsp/lossless_enc_mips32.c
+++ b/src/dsp/lossless_enc_mips32.c
@@ -241,6 +241,49 @@ static WEBP_INLINE void GetEntropyUnrefinedHelper(
   *i_prev = i;
 }
 
+static void GetEntropyUnrefined(const uint32_t X[], int length,
+                                VP8LBitEntropy* const bit_entropy,
+                                VP8LStreaks* const stats) {
+  int i;
+  int i_prev = 0;
+  uint32_t x_prev = X[0];
+
+  memset(stats, 0, sizeof(*stats));
+  VP8LBitEntropyInit(bit_entropy);
+
+  for (i = 1; i < length; ++i) {
+    const uint32_t x = X[i];
+    if (x != x_prev) {
+      GetEntropyUnrefinedHelper(x, i, &x_prev, &i_prev, bit_entropy, stats);
+    }
+  }
+  GetEntropyUnrefinedHelper(0, i, &x_prev, &i_prev, bit_entropy, stats);
+
+  bit_entropy->entropy += VP8LFastSLog2(bit_entropy->sum);
+}
+
+static void GetCombinedEntropyUnrefined(const uint32_t X[], const uint32_t Y[],
+                                        int length,
+                                        VP8LBitEntropy* const bit_entropy,
+                                        VP8LStreaks* const stats) {
+  int i = 1;
+  int i_prev = 0;
+  uint32_t xy_prev = X[0] + Y[0];
+
+  memset(stats, 0, sizeof(*stats));
+  VP8LBitEntropyInit(bit_entropy);
+
+  for (i = 1; i < length; ++i) {
+    const uint32_t xy = X[i] + Y[i];
+    if (xy != xy_prev) {
+      GetEntropyUnrefinedHelper(xy, i, &xy_prev, &i_prev, bit_entropy, stats);
+    }
+  }
+  GetEntropyUnrefinedHelper(0, i, &xy_prev, &i_prev, bit_entropy, stats);
+
+  bit_entropy->entropy += VP8LFastSLog2(bit_entropy->sum);
+}
+
 #define ASM_START                                       \
   __asm__ volatile(                                     \
     ".set   push                            \n\t"       \
@@ -376,7 +419,8 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitMIPS32(void) {
   VP8LFastLog2Slow = FastLog2Slow;
   VP8LExtraCost = ExtraCost;
   VP8LExtraCostCombined = ExtraCostCombined;
-  VP8LGetEntropyUnrefinedHelper = GetEntropyUnrefinedHelper;
+  VP8LGetEntropyUnrefined = GetEntropyUnrefined;
+  VP8LGetCombinedEntropyUnrefined = GetCombinedEntropyUnrefined;
   VP8LHistogramAdd = HistogramAdd;
 }