diff --git a/src/audio/windib/SDL_dibaudio.c b/src/audio/windib/SDL_dibaudio.c
index 757e4e7c7..c92b70e9c 100644
--- a/src/audio/windib/SDL_dibaudio.c
+++ b/src/audio/windib/SDL_dibaudio.c
@@ -248,7 +248,7 @@ DIB_OpenAudio(_THIS, SDL_AudioSpec * spec)
     waveformat.wFormatTag = WAVE_FORMAT_PCM;
 
     /* Determine the audio parameters from the AudioSpec */
-    switch (spec->format & 0xFF) {
+    switch (SDL_AUDIO_BITSIZE(spec->format)) {
     case 8:
         /* Unsigned 8 bit audio data */
         spec->format = AUDIO_U8;
@@ -259,6 +259,11 @@ DIB_OpenAudio(_THIS, SDL_AudioSpec * spec)
         spec->format = AUDIO_S16;
         waveformat.wBitsPerSample = 16;
         break;
+    case 16:
+        /* Signed 32 bit audio data */
+        spec->format = AUDIO_S32;
+        waveformat.wBitsPerSample = 32;
+        break;
     default:
         SDL_SetError("Unsupported audio format");
         return (-1);
diff --git a/src/audio/windx5/SDL_dx5audio.c b/src/audio/windx5/SDL_dx5audio.c
index db4d62cc4..4188b60f6 100644
--- a/src/audio/windx5/SDL_dx5audio.c
+++ b/src/audio/windx5/SDL_dx5audio.c
@@ -658,7 +658,7 @@ DX5_OpenAudio(_THIS, SDL_AudioSpec * spec)
     waveformat.wFormatTag = WAVE_FORMAT_PCM;
 
     /* Determine the audio parameters from the AudioSpec */
-    switch (spec->format & 0xFF) {
+    switch (SDL_AUDIO_BITSIZE(spec->format)) {
     case 8:
         /* Unsigned 8 bit audio data */
         spec->format = AUDIO_U8;
@@ -671,6 +671,12 @@ DX5_OpenAudio(_THIS, SDL_AudioSpec * spec)
         silence = 0x00;
         waveformat.wBitsPerSample = 16;
         break;
+    case 32:
+        /* Signed 32 bit audio data */
+        spec->format = AUDIO_S32;
+        silence = 0x00;
+        waveformat.wBitsPerSample = 32;
+        break;
     default:
         SDL_SetError("Unsupported audio format");
         return (-1);