diff --git a/core/math/vector4.h b/core/math/vector4.h
index 0e0bedf3d..df2bb1474 100644
--- a/core/math/vector4.h
+++ b/core/math/vector4.h
@@ -36,7 +36,7 @@
 #include "core/math/vector3.h"
 #include "core/ustring.h"
 
-struct _NO_DISCARD_ Vector4 {
+struct _NO_DISCARD_CLASS_ Vector4 {
 	enum Axis {
 		AXIS_X,
 		AXIS_Y,
diff --git a/core/math/vector4i.h b/core/math/vector4i.h
index 200b4ecac..ed30c7228 100644
--- a/core/math/vector4i.h
+++ b/core/math/vector4i.h
@@ -37,7 +37,7 @@
 class String;
 struct Vector4;
 
-struct _NO_DISCARD_ Vector4i {
+struct _NO_DISCARD_CLASS_ Vector4i {
 	enum Axis {
 		AXIS_X,
 		AXIS_Y,