diff --git a/lib/util/pm_c_util.h b/lib/util/pm_c_util.h
index 01a0765..8f5aa01 100644
--- a/lib/util/pm_c_util.h
+++ b/lib/util/pm_c_util.h
@@ -80,10 +80,10 @@
 #endif
 
 #ifndef TRUE
-  #define TRUE true
+  #define TRUE 1
   #endif
 #ifndef FALSE
-  #define FALSE false
+  #define FALSE 0
   #endif
 
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))