diff --git a/test/gtc/gtc_type_aligned.cpp b/test/gtc/gtc_type_aligned.cpp
index e76bea3d7..b98131e16 100644
--- a/test/gtc/gtc_type_aligned.cpp
+++ b/test/gtc/gtc_type_aligned.cpp
@@ -1,3 +1,6 @@
+// Force explicit ctors in this test to catch returning the wrong vector size from e.g. glm::xyz
+#define GLM_FORCE_EXPLICIT_CTOR
+
 #include <glm/glm.hpp>
 
 #if GLM_CONFIG_ALIGNED_GENTYPES == GLM_ENABLE