diff --git a/src/modules/controllib/blocks.hpp b/src/modules/controllib/blocks.hpp
index 65600190b2..979b9541be 100644
--- a/src/modules/controllib/blocks.hpp
+++ b/src/modules/controllib/blocks.hpp
@@ -39,6 +39,7 @@
 
 #pragma once
 
+#include <px4_defines.h>
 #include <assert.h>
 #include <time.h>
 #include <stdlib.h>
diff --git a/src/platforms/px4_defines.h b/src/platforms/px4_defines.h
index db54f8c53e..1e3939bb7c 100644
--- a/src/platforms/px4_defines.h
+++ b/src/platforms/px4_defines.h
@@ -146,6 +146,8 @@ __END_DECLS
 #define OK 0
 #define ERROR -1
 
+#define MAX_RAND 32767
+
 #if defined(__PX4_QURT)
 #define M_PI			3.14159265358979323846
 #define M_PI_2			1.57079632679489661923
@@ -209,6 +211,7 @@ __END_DECLS
 #define fminf(x, y) ((x) > (y) ? y : x)
 #endif
 
+
 #endif
 
 /*