diff --git a/include/cglm/common.h b/include/cglm/common.h
index 422716a..42d5e67 100644
--- a/include/cglm/common.h
+++ b/include/cglm/common.h
@@ -11,6 +11,7 @@
 #define _USE_MATH_DEFINES /* for windows */
 
 #include <stdint.h>
+#include <stddef.h>
 #include <math.h>
 #include <float.h>