diff --git a/darwin/image.m b/darwin/image.m
index cf2bdf13..a4b322c7 100644
--- a/darwin/image.m
+++ b/darwin/image.m
@@ -34,7 +34,7 @@ void uiImageAppend(uiImage *i, void *pixels, int pixelWidth, int pixelHeight, in
 {
 	NSBitmapImageRep *repCalibrated, *repsRGB;
 	uint8_t *swizzled, *bp, *sp;
-	int n, l;
+	int x, y;
 	unsigned char *pix[1];
 
 	// OS X demands that R and B are in the opposite order from what we expect
@@ -43,8 +43,8 @@ void uiImageAppend(uiImage *i, void *pixels, int pixelWidth, int pixelHeight, in
 	swizzled = (uint8_t *) uiprivAlloc((byteStride * pixelHeight) * sizeof (uint8_t), "uint8_t[]");
 	bp = (uint8_t *) pixels;
 	sp = swizzled;
-	for (l = 0; l < pixelHeight; l++){
-		for (n = 0; n < pixelWidth; n++) {
+	for (y = 0; y < pixelHeight; y++){
+		for (x = 0; x < pixelWidth; x++) {
 			sp[0] = bp[2];
 			sp[1] = bp[1];
 			sp[2] = bp[0];