diff --git a/src/matrixMath.c b/src/matrixMath.c
index 38d907a..eb6cc5c 100644
--- a/src/matrixMath.c
+++ b/src/matrixMath.c
@@ -4,6 +4,7 @@
 #include <GL/glew.h>
 #include <string.h>
 
+#include <assert.h>
 #include "matrixMath.h"
 
 // MATRICES IN COLUMN MAJOR