diff --git a/include/cglm/struct/mat3.h b/include/cglm/struct/mat3.h
index da53989..c5c6a2a 100644
--- a/include/cglm/struct/mat3.h
+++ b/include/cglm/struct/mat3.h
@@ -38,12 +38,12 @@
 #include "../mat3.h"
 #include "vec3.h"
 
-#define GLMS_MAT3_IDENTITY_INIT  {1.0f, 0.0f, 0.0f,                          \
-                                  0.0f, 1.0f, 0.0f,                          \
-                                  0.0f, 0.0f, 1.0f}
-#define GLMS_MAT3_ZERO_INIT      {0.0f, 0.0f, 0.0f,                          \
-                                  0.0f, 0.0f, 0.0f,                          \
-                                  0.0f, 0.0f, 0.0f}
+#define GLMS_MAT3_IDENTITY_INIT  {{1.0f, 0.0f, 0.0f,                         \
+                                   0.0f, 1.0f, 0.0f,                         \
+                                   0.0f, 0.0f, 1.0f}}
+#define GLMS_MAT3_ZERO_INIT      {{0.0f, 0.0f, 0.0f,                         \
+                                   0.0f, 0.0f, 0.0f,                         \
+                                   0.0f, 0.0f, 0.0f}}
 
 /* for C only */
 #define GLMS_MAT3_IDENTITY ((mat3s)GLMS_MAT3_IDENTITY_INIT)
diff --git a/include/cglm/struct/mat4.h b/include/cglm/struct/mat4.h
index 14fa614..d27d4ec 100644
--- a/include/cglm/struct/mat4.h
+++ b/include/cglm/struct/mat4.h
@@ -53,15 +53,15 @@
 #include "vec4.h"
 #include "vec3.h"
 
-#define GLMS_MAT4_IDENTITY_INIT  {1.0f, 0.0f, 0.0f, 0.0f,                    \
-                                  0.0f, 1.0f, 0.0f, 0.0f,                    \
-                                  0.0f, 0.0f, 1.0f, 0.0f,                    \
-                                  0.0f, 0.0f, 0.0f, 1.0f}
+#define GLMS_MAT4_IDENTITY_INIT  {{1.0f, 0.0f, 0.0f, 0.0f,                   \
+                                   0.0f, 1.0f, 0.0f, 0.0f,                   \
+                                   0.0f, 0.0f, 1.0f, 0.0f,                   \
+                                   0.0f, 0.0f, 0.0f, 1.0f}}
 
-#define GLMS_MAT4_ZERO_INIT      {0.0f, 0.0f, 0.0f, 0.0f,                    \
-                                  0.0f, 0.0f, 0.0f, 0.0f,                    \
-                                  0.0f, 0.0f, 0.0f, 0.0f,                    \
-                                  0.0f, 0.0f, 0.0f, 0.0f}
+#define GLMS_MAT4_ZERO_INIT      {{0.0f, 0.0f, 0.0f, 0.0f,                   \
+                                   0.0f, 0.0f, 0.0f, 0.0f,                   \
+                                   0.0f, 0.0f, 0.0f, 0.0f,                   \
+                                   0.0f, 0.0f, 0.0f, 0.0f}}
 
 /* for C only */
 #define GLMS_MAT4_IDENTITY ((mat4s)GLMS_MAT4_IDENTITY_INIT)