diff --git a/src/audio.c b/src/audio.c
index 470862fc9a..678938e21c 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -435,7 +435,7 @@ void audio_init2(int device)
 			}
 		}
 	}
-	if (!RCT2_GLOBAL(RCT2_ADDRESS_CONFIG_FLAGS, uint8) & 1 << 4) {
+	if (!(RCT2_GLOBAL(RCT2_ADDRESS_CONFIG_FLAGS, uint8) & 1 << 4)) {
 		RCT2_GLOBAL(RCT2_ADDRESS_CONFIG_SOUND_SW_BUFFER, uint32) = RCT2_GLOBAL(0x001425B74, uint32) != RCT2_GLOBAL(0x001425B78, uint32) || RCT2_GLOBAL(0x001425B74, uint32) != RCT2_GLOBAL(0x001425B7C, uint32);
 		RCT2_GLOBAL(RCT2_ADDRESS_CONFIG_FLAGS, uint8) |= 1 << 4;
 		config_save();