diff --git a/src/pulsecore/svolume_mmx.c b/src/pulsecore/svolume_mmx.c
index 170f01d45..62f3397e4 100644
--- a/src/pulsecore/svolume_mmx.c
+++ b/src/pulsecore/svolume_mmx.c
@@ -233,7 +233,7 @@ pa_volume_s16re_mmx (int16_t *samples, int32_t *volumes, unsigned channels, unsi
     );
 }
 
-#define RUN_TEST
+#undef RUN_TEST
 
 #ifdef RUN_TEST
 #define CHANNELS 2