diff --git a/include/cglm/common.h b/include/cglm/common.h
index 83d54be..8596970 100644
--- a/include/cglm/common.h
+++ b/include/cglm/common.h
@@ -8,7 +8,8 @@
 #ifndef cglm_common_h
 #define cglm_common_h
 
-#define _USE_MATH_DEFINES /* for windows */
+#define _USE_MATH_DEFINES       /* for windows */
+#define _CRT_SECURE_NO_WARNINGS /* for windows */
 
 #include <stdint.h>
 #include <stddef.h>
diff --git a/include/cglm/io.h b/include/cglm/io.h
index bbaa9bf..18c21da 100644
--- a/include/cglm/io.h
+++ b/include/cglm/io.h
@@ -17,7 +17,8 @@
 
 #ifndef cglm_io_h
 #define cglm_io_h
-#if defined(DEBUG) || defined(CGLM_DEFINE_PRINTS) || defined(CGLM_LIB_SRC)
+#if defined(DEBUG) || defined(_DEBUG) \
+   || defined(CGLM_DEFINE_PRINTS) || defined(CGLM_LIB_SRC)
 
 #include "common.h"
 
diff --git a/test/include/common.h b/test/include/common.h
index 3c32b9f..c5529e4 100644
--- a/test/include/common.h
+++ b/test/include/common.h
@@ -8,6 +8,9 @@
 #ifndef tests_common_h
 #define tests_common_h
 
+#define _USE_MATH_DEFINES       /* for windows */
+#define _CRT_SECURE_NO_WARNINGS /* for windows */
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>