diff --git a/src/liberty/math/Matrix.h b/src/liberty/math/Matrix.h
index 72099cef..d2ff6067 100644
--- a/src/liberty/math/Matrix.h
+++ b/src/liberty/math/Matrix.h
@@ -18,6 +18,7 @@ public:
 	RwMatrix *m_attachment = nil;
 	bool m_hasRwMatrix = false;	// are we the owner?
 
+	CMatrix(void) {}
 	CMatrix(CMatrix const &m);
 	CMatrix(RwMatrix *matrix, bool owner = false);
 	CMatrix(float scale){
diff --git a/src/miami/math/Matrix.h b/src/miami/math/Matrix.h
index 39a476d6..dd6f892e 100644
--- a/src/miami/math/Matrix.h
+++ b/src/miami/math/Matrix.h
@@ -34,7 +34,7 @@ public:
 	bool m_hasRwMatrix=false;	// are we the owner?
 #endif
 
-	CMatrix(void)=default;
+	CMatrix(void) {}
 	CMatrix(CMatrix const &m);
 	CMatrix(RwMatrix *matrix, bool owner = false);
 	CMatrix(float scale){