diff --git a/src/dsp/argb_mips_dsp_r2.c b/src/dsp/argb_mips_dsp_r2.c
index a613d457..9e8b06c4 100644
--- a/src/dsp/argb_mips_dsp_r2.c
+++ b/src/dsp/argb_mips_dsp_r2.c
@@ -93,16 +93,19 @@ static void PackRGB(const uint8_t* r, const uint8_t* g, const uint8_t* b,
   );
 }
 
-#endif  // WEBP_USE_MIPS_DSP_R2
-
 //------------------------------------------------------------------------------
 // Entry point
 
 extern void VP8EncDspARGBInitMIPSdspR2(void);
 
 WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitMIPSdspR2(void) {
-#if defined(WEBP_USE_MIPS_DSP_R2)
   VP8PackARGB = PackARGB;
   VP8PackRGB = PackRGB;
-#endif  // WEBP_USE_MIPS_DSP_R2
 }
+
+#else  // !WEBP_USE_MIPS_DSP_R2
+
+extern void VP8EncDspARGBInitMIPSdspR2(void);
+WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitMIPSdspR2(void) {}
+
+#endif  // WEBP_USE_MIPS_DSP_R2
diff --git a/src/dsp/argb_sse2.c b/src/dsp/argb_sse2.c
index a1e9e524..dc54e2c8 100644
--- a/src/dsp/argb_sse2.c
+++ b/src/dsp/argb_sse2.c
@@ -51,12 +51,18 @@ static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g,
   }
 }
 
-#endif    // WEBP_USE_SSE2
+//------------------------------------------------------------------------------
+// Entry point
 
 extern void VP8EncDspARGBInitSSE2(void);
 
 WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitSSE2(void) {
-#if defined(WEBP_USE_SSE2)
   VP8PackARGB = PackARGB;
-#endif
 }
+
+#else  // !WEBP_USE_SSE2
+
+extern void VP8EncDspARGBInitSSE2(void);
+WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitSSE2(void) {}
+
+#endif  // WEBP_USE_SSE2