diff --git a/firmware/util/common.h b/firmware/util/common.h
index 0ae45ad87d..5fa2d1cd10 100644
--- a/firmware/util/common.h
+++ b/firmware/util/common.h
@@ -22,8 +22,12 @@
 #ifndef COMMON_H_INCLUDED
 #define COMMON_H_INCLUDED
 
+#if !defined(MIN)
 #define MIN(a,b) (((a)<(b))?(a):(b))
+#endif
+#if !defined(MAX)
 #define MAX(a,b) (((a)>(b))?(a):(b))
+#endif
 
 #define CLAMP(x, low, high) ({\
 	__typeof__(x) __x = (x); \