diff --git a/runelite-mixins/src/main/java/net/runelite/mixins/RSSpriteMixin.java b/runelite-mixins/src/main/java/net/runelite/mixins/RSSpriteMixin.java
index d417f077f5..2a9863d9e5 100644
--- a/runelite-mixins/src/main/java/net/runelite/mixins/RSSpriteMixin.java
+++ b/runelite-mixins/src/main/java/net/runelite/mixins/RSSpriteMixin.java
@@ -155,6 +155,21 @@ public abstract class RSSpriteMixin implements RSSprite
 		if (!hdMinimapEnabled)
 		{
 			rs$drawAlphaMapped(x, y, width, height, xOffset, yOffset, rotation, zoom, xOffsets, yOffsets);
+
+			// hack required for this to work with gpu mode because
+			// the alpha injector does not inject the copied method
+			int[] graphicsPixels = client.getGraphicsPixels();
+			int pixelOffset = x + y * client.getGraphicsPixelsWidth();
+			for (int h = 0; h < height; h++)
+			{
+				int offset = xOffsets[h];
+				int pixelIndex = pixelOffset + offset;
+				for (int w = -yOffsets[h]; w < 0; w++)
+				{
+					graphicsPixels[pixelIndex++] |= 0xFF000000;
+				}
+				pixelOffset += client.getGraphicsPixelsWidth();
+			}
 			return;
 		}
 		try