diff --git a/src/render-cg/dvram.c b/src/render-cg/dvram.c
index 491e3e1..46a2c91 100644
--- a/src/render-cg/dvram.c
+++ b/src/render-cg/dvram.c
@@ -13,7 +13,7 @@ bool dvram_init(void)
 	/* Leave MARGIN bytes on each side of the region; this enables some
 	   important optimisations in the image renderer. We also add another
 	   32 bytes so we can manually 32-align the region */
-	uint32_t region = (uint32_t)malloc(DWIDTH * DHEIGHT * 2 + MARGIN + 32);
+	uint32_t region = (uint32_t)malloc(DWIDTH*DHEIGHT*2 + MARGIN*2 + 32);
 	if(region == 0)
 		return false;