diff --git a/src/libFLAC/stream_encoder_intrin_sse2.c b/src/libFLAC/stream_encoder_intrin_sse2.c
index 4e9d5dbf..3a06392c 100644
--- a/src/libFLAC/stream_encoder_intrin_sse2.c
+++ b/src/libFLAC/stream_encoder_intrin_sse2.c
@@ -95,7 +95,7 @@ void FLAC__precompute_partition_info_sums_intrin_sse2(const FLAC__int32 residual
 
 				mm_sum = _mm_add_epi32(mm_sum, _mm_srli_si128(mm_sum, 8));
 				mm_sum = _mm_add_epi32(mm_sum, _mm_srli_si128(mm_sum, 4));
-				abs_residual_partition_sums[partition] = _mm_cvtsi128_si32(mm_sum);
+				abs_residual_partition_sums[partition] = (FLAC__uint32)_mm_cvtsi128_si32(mm_sum);
 			}
 		}
 		else { /* have to pessimistically use 64 bits for accumulator */
diff --git a/src/libFLAC/stream_encoder_intrin_ssse3.c b/src/libFLAC/stream_encoder_intrin_ssse3.c
index 669536ac..f6a27bae 100644
--- a/src/libFLAC/stream_encoder_intrin_ssse3.c
+++ b/src/libFLAC/stream_encoder_intrin_ssse3.c
@@ -89,7 +89,7 @@ void FLAC__precompute_partition_info_sums_intrin_ssse3(const FLAC__int32 residua
 
 				mm_sum = _mm_hadd_epi32(mm_sum, mm_sum);
 				mm_sum = _mm_hadd_epi32(mm_sum, mm_sum);
-				abs_residual_partition_sums[partition] = _mm_cvtsi128_si32(mm_sum);
+				abs_residual_partition_sums[partition] = (FLAC__uint32)_mm_cvtsi128_si32(mm_sum);
 			}
 		}
 		else { /* have to pessimistically use 64 bits for accumulator */