diff --git a/src/dsp/enc.c b/src/dsp/enc.c
index bcae7e01..f639f557 100644
--- a/src/dsp/enc.c
+++ b/src/dsp/enc.c
@@ -69,7 +69,7 @@ static void CollectHistogram(const uint8_t* ref, const uint8_t* pred,
 
     // Convert coefficients to bin.
     for (k = 0; k < 16; ++k) {
-      const int v = abs(out[k]) >> 3;  // TODO(skal): add rounding?
+      const int v = abs(out[k]) >> 3;
       const int clipped_value = clip_max(v, MAX_COEFF_THRESH);
       ++distribution[clipped_value];
     }
diff --git a/src/dsp/enc_mips_dsp_r2.c b/src/dsp/enc_mips_dsp_r2.c
index 7c814fa0..7ab96f68 100644
--- a/src/dsp/enc_mips_dsp_r2.c
+++ b/src/dsp/enc_mips_dsp_r2.c
@@ -1393,8 +1393,6 @@ static void FTransformWHT(const int16_t* in, int16_t* out) {
   "absq_s.ph  %[temp1],  %[temp1]                      \n\t"                   \
   "absq_s.ph  %[temp2],  %[temp2]                      \n\t"                   \
   "absq_s.ph  %[temp3],  %[temp3]                      \n\t"                   \
-  /* TODO(skal): add rounding ? shra_r.ph : shra.ph */                         \
-  /*             for following 4 instructions       */                         \
   "shra.ph    %[temp0],  %[temp0],    3                \n\t"                   \
   "shra.ph    %[temp1],  %[temp1],    3                \n\t"                   \
   "shra.ph    %[temp2],  %[temp2],    3                \n\t"                   \
diff --git a/src/enc/alpha.c b/src/enc/alpha.c
index 2ad3298b..03e3ad07 100644
--- a/src/enc/alpha.c
+++ b/src/enc/alpha.c
@@ -122,7 +122,6 @@ static int EncodeAlphaInternal(const uint8_t* const data, int width, int height,
   assert(method >= ALPHA_NO_COMPRESSION);
   assert(method <= ALPHA_LOSSLESS_COMPRESSION);
   assert(sizeof(header) == ALPHA_HEADER_LEN);
-  // TODO(skal): have a common function and #define's to validate alpha params.
 
   filter_func = WebPFilters[filter];
   if (filter_func != NULL) {