diff --git a/src/audio/SDL_audio.c b/src/audio/SDL_audio.c
index 282b1a7aef..faec4deefa 100644
--- a/src/audio/SDL_audio.c
+++ b/src/audio/SDL_audio.c
@@ -40,7 +40,7 @@ static const AudioBootStrap *const bootstrap[] = {
 #if SDL_AUDIO_DRIVER_ALSA
     &ALSA_bootstrap,
 #endif
-#if SDL_AUDIO_DRIVER_SNDIO
+#ifdef SDL_AUDIO_DRIVER_SNDIO
     &SNDIO_bootstrap,
 #endif
 #if SDL_AUDIO_DRIVER_NETBSD
diff --git a/src/audio/sndio/SDL_sndioaudio.c b/src/audio/sndio/SDL_sndioaudio.c
index 5afc54feed..3a3f045347 100644
--- a/src/audio/sndio/SDL_sndioaudio.c
+++ b/src/audio/sndio/SDL_sndioaudio.c
@@ -21,7 +21,7 @@
 
 #include "SDL_internal.h"
 
-#if SDL_AUDIO_DRIVER_SNDIO
+#ifdef SDL_AUDIO_DRIVER_SNDIO
 
 /* OpenBSD sndio target */