diff --git a/radio/src/definitions.h b/radio/src/definitions.h
index a569fd458..bb8a7104a 100644
--- a/radio/src/definitions.h
+++ b/radio/src/definitions.h
@@ -21,6 +21,10 @@
 #ifndef _DEFINITIONS_H_
 #define _DEFINITIONS_H_
 
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stddef.h>
+
 #if !defined(M_PI)
 #define M_PI         3.14159265358979323846   // pi
 #define M_PI_2       1.57079632679489661923   // pi/2
@@ -37,10 +41,6 @@
 #define M_LN10       2.30258509299404568402   // ln(10)
 #endif
 
-#include <inttypes.h>
-#include <stdbool.h>
-#include <stddef.h>
-
 #if !defined(UNUSED)
   #define UNUSED(x)           ((void)(x)) /* to avoid warnings */
 #endif