diff --git a/CHANGES.md b/CHANGES.md
index 10c022a0..37b8aa1f 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -8,6 +8,7 @@ v0.11.23 - TBD
 * Fixed a memory leak in the resource manager when opening a file fails.
 * Fixed an assertion failure in the resource manager when opening a file fails.
 * Fixed a compilation warning relating to `MA_FALLTHROUGH`
+* Fixed an undefined behavior error in the s16 to s32 conversion routine.
 * Fixed an undefined behavior error relating to MurmurHash3.
 * Fixed an undefined behavior error with the LCG random number generator.
 * Fixed a compilation error with `MA_NO_SSE2`.
diff --git a/miniaudio.h b/miniaudio.h
index dfd3f744..eca50be7 100644
--- a/miniaudio.h
+++ b/miniaudio.h
@@ -45496,7 +45496,7 @@ static MA_INLINE void ma_pcm_s16_to_s32__reference(void* dst, const void* src, m
 
     ma_uint64 i;
     for (i = 0; i < count; i += 1) {
-        dst_s32[i] = src_s16[i] << 16;
+        dst_s32[i] = (ma_int32)src_s16[i] << 16;
     }
 
     (void)ditherMode;