diff --git a/distrho/src/DistrhoDefines.h b/distrho/src/DistrhoDefines.h
index e42eec2c..452e802f 100644
--- a/distrho/src/DistrhoDefines.h
+++ b/distrho/src/DistrhoDefines.h
@@ -211,7 +211,7 @@ private:                                         \
 #endif
 
 /* Useful macros */
-#define ARRAY_SIZE(ARRAY) sizeof(ARRAY)/sizeof(ARRAY[0])
+#define ARRAY_SIZE(ARRAY) (sizeof(ARRAY)/sizeof(ARRAY[0]))
 
 /* Useful typedefs */
 typedef unsigned char uchar;