diff --git a/spa/plugins/audioconvert/channelmix-ops.h b/spa/plugins/audioconvert/channelmix-ops.h
index d43eafa4e..c480e930e 100644
--- a/spa/plugins/audioconvert/channelmix-ops.h
+++ b/spa/plugins/audioconvert/channelmix-ops.h
@@ -152,3 +152,5 @@ DEFINE_FUNCTION(f32_5p1_3p1, sse);
 DEFINE_FUNCTION(f32_5p1_4, sse);
 DEFINE_FUNCTION(f32_7p1_4, sse);
 #endif
+
+#undef DEFINE_FUNCTION