@@ -45,18 +45,19 @@
 	memcpy(_values, values, sizeof(_values));
 
 	return self;
 }
 
-- (float (*)[4][4])values
+- (float (*)[4])values
 {
-	return &_values;
+	return _values;
 }
 
 - (instancetype)copy
 {
-	return [[OFMatrix4x4 alloc] initWithValues: _values];
+	return [[OFMatrix4x4 alloc]
+	    initWithValues: (const float (*)[4])_values];
 }
 
 - (bool)isEqual: (OFMatrix4x4 *)matrix
 {
 	if (![matrix isKindOfClass: [OFMatrix4x4 class]])
@@ -125,11 +126,11 @@
 }
 
 - (void)translateWithVector: (OFVector3D)vector
 {
 	OFMatrix4x4 *translation = [[OFMatrix4x4 alloc] initWithValues:
-	    (float [4][4]){
+	    (const float [4][4]){
 		{ 1, 0, 0, vector.x },
 		{ 0, 1, 0, vector.y },
 		{ 0, 0, 1, vector.z },
 		{ 0, 0, 0, 1 }
 	    }];
@@ -138,11 +139,11 @@
 }
 
 - (void)scaleWithVector: (OFVector3D)vector
 {
 	OFMatrix4x4 *scale = [[OFMatrix4x4 alloc] initWithValues:
-	    (float [4][4]){
+	    (const float [4][4]){
 		{ vector.x, 0, 0, 0 },
 		{ 0, vector.y, 0, 0 },
 		{ 0, 0, vector.z, 0 },
 		{ 0, 0, 0, 1 }
 	    }];