diff --git a/CHANGES b/CHANGES
index 4ccfef90d..dc568189d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -90,6 +90,7 @@ Emulation fixes:
  - ARM: Fix STR writeback pipeline stage
  - ARM: Partially fix LDM/STM writeback with empty register list
  - GBA DMA: Fix case where DMAs could get misaligned (fixes mgba.io/i/1092)
+ - GBA Video: Fix OpenGL renderer 512x512 backgrounds (fixes mgba.io/i/1572)
 Other fixes:
  - 3DS: Fix screen darkening (fixes mgba.io/i/1562)
  - Vita: Fix analog controls (fixes mgba.io/i/1554)
diff --git a/src/gba/renderers/gl.c b/src/gba/renderers/gl.c
index 13a36a231..398f14a57 100644
--- a/src/gba/renderers/gl.c
+++ b/src/gba/renderers/gl.c
@@ -145,21 +145,21 @@ static const char* const _renderMode0 =
 	"	if (mosaic.y > 1) {\n"
 	"		coord.y -= coord.y % mosaic.y;\n"
 	"	}\n"
-	"	coord += (ivec2(0x3FF, 0x3FF000) & offset[int(texCoord.y)]) >> ivec2(0, 12);\n"
-	"	ivec2 wrap = ivec2(255, 511);\n"
-	"	if (size == 3) {\n"
-	"		coord.y += (coord.y & 256) << 1;\n"
-	"		wrap.y = 1023;\n"
-	"	} else if (size == 0) {\n"
-	"		wrap.y = 255;\n"
-	"	}\n"
-	"	if (size != 2) {\n"
-	"		coord.y &= ~256;\n"
-	"	}\n"
+	"	coord += (ivec2(0x1FF, 0x1FF000) & offset[int(texCoord.y)]) >> ivec2(0, 12);\n"
+	"	ivec2 wrap = ivec2(255, 255);\n"
+	"	int doty = 0;\n"
 	"	if ((size & 1) == 1) {\n"
-	"		coord.y += coord.x & 256;\n"
+	"		wrap.x = 511;\n"
+	"		++doty;\n"
+	"	}\n"
+	"	if ((size & 2) == 2) {\n"
+	"		wrap.y = 511;\n"
+	"		++doty;\n"
 	"	}\n"
 	"	coord &= wrap;\n"
+	"	wrap = coord & 256;\n"
+	"	coord &= 255;\n"
+	"	coord.y += wrap.x + wrap.y * doty;\n"
 	"	int mapAddress = screenBase + (coord.x >> 3) + (coord.y >> 3) * 32;\n"
 	"	vec4 map = texelFetch(vram, ivec2(mapAddress & 255, mapAddress >> 8), 0);\n"
 	"	int tileFlags = int(map.g * 15.9);\n"