diff --git a/src/dsp/alpha_processing_mips_dsp_r2.c b/src/dsp/alpha_processing_mips_dsp_r2.c
index 8a277341..186e9e03 100644
--- a/src/dsp/alpha_processing_mips_dsp_r2.c
+++ b/src/dsp/alpha_processing_mips_dsp_r2.c
@@ -131,7 +131,7 @@ static void MultARGBRow(uint32_t* const ptr, int width, int inverse) {
 
 extern void WebPInitAlphaProcessingMIPSdspR2(void);
 
-void WebPInitAlphaProcessingMIPSdspR2(void) {
+WEBP_TSAN_IGNORE_FUNCTION void WebPInitAlphaProcessingMIPSdspR2(void) {
 #if defined(WEBP_USE_MIPS_DSP_R2)
   WebPDispatchAlpha = DispatchAlpha;
   WebPMultARGBRow = MultARGBRow;
diff --git a/src/dsp/filters_mips_dsp_r2.c b/src/dsp/filters_mips_dsp_r2.c
index b71a24f0..56fd951a 100644
--- a/src/dsp/filters_mips_dsp_r2.c
+++ b/src/dsp/filters_mips_dsp_r2.c
@@ -389,7 +389,7 @@ static void GradientUnfilter(int width, int height, int stride, int row,
 
 extern void VP8FiltersInitMIPSdspR2(void);
 
-void VP8FiltersInitMIPSdspR2(void) {
+WEBP_TSAN_IGNORE_FUNCTION void VP8FiltersInitMIPSdspR2(void) {
 #if defined(WEBP_USE_MIPS_DSP_R2)
   WebPFilters[WEBP_FILTER_HORIZONTAL] = HorizontalFilter;
   WebPFilters[WEBP_FILTER_VERTICAL] = VerticalFilter;