diff --git a/src/dsp/rescaler.c b/src/dsp/rescaler.c
index 7bdae1a7..72ad04ca 100644
--- a/src/dsp/rescaler.c
+++ b/src/dsp/rescaler.c
@@ -110,7 +110,7 @@ void WebPRescalerExportRowExpandC(WebPRescaler* const wrk) {
     }
   } else {
     const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub);
-    const uint32_t A = WEBP_RESCALER_ONE - B;
+    const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B);
     for (x_out = 0; x_out < x_out_max; ++x_out) {
       const uint64_t I = (uint64_t)A * frow[x_out]
                        + (uint64_t)B * irow[x_out];
diff --git a/src/dsp/rescaler_sse2.c b/src/dsp/rescaler_sse2.c
index a0534cab..d0cfc7d0 100644
--- a/src/dsp/rescaler_sse2.c
+++ b/src/dsp/rescaler_sse2.c
@@ -105,7 +105,7 @@ static void RescalerExportRowExpandSSE2(WebPRescaler* const wrk) {
     }
   } else {
     const uint32_t B = WEBP_RESCALER_FRAC(-wrk->y_accum, wrk->y_sub);
-    const uint32_t A = WEBP_RESCALER_ONE - B;
+    const uint32_t A = (uint32_t)(WEBP_RESCALER_ONE - B);
     const __m128i mA = _mm_set_epi64x(A, A);
     const __m128i mB = _mm_set_epi64x(B, B);
     const __m128i rounder = _mm_set_epi64x(ROUNDER, ROUNDER);
diff --git a/src/utils/rescaler.h b/src/utils/rescaler.h
index 61405875..98b01a76 100644
--- a/src/utils/rescaler.h
+++ b/src/utils/rescaler.h
@@ -22,7 +22,8 @@ extern "C" {
 
 #define WEBP_RESCALER_RFIX 32   // fixed-point precision for multiplies
 #define WEBP_RESCALER_ONE (1ull << WEBP_RESCALER_RFIX)
-#define WEBP_RESCALER_FRAC(x, y) (((uint64_t)(x) << WEBP_RESCALER_RFIX) / (y))
+#define WEBP_RESCALER_FRAC(x, y) \
+    ((uint32_t)(((uint64_t)(x) << WEBP_RESCALER_RFIX) / (y)))
 
 // Structure used for on-the-fly rescaling
 typedef uint32_t rescaler_t;   // type for side-buffer