diff --git a/trunk/fluidsynth/src/drivers/fluid_oss.c b/trunk/fluidsynth/src/drivers/fluid_oss.c
index 40761db..840dad1 100644
--- a/trunk/fluidsynth/src/drivers/fluid_oss.c
+++ b/trunk/fluidsynth/src/drivers/fluid_oss.c
@@ -45,7 +45,7 @@
 #define BUFFER_LENGTH 512
 
 // Build issue on some systems (OSS 4.0)?
-#ifndef SOUND_PCM_WRITE_CHANNELS
+#ifdef SNDCTL_DSP_CHANNELS
   #define SOUND_PCM_WRITE_CHANNELS        SNDCTL_DSP_CHANNELS
 #endif