diff --git a/desmume/src/gfx3d.cpp b/desmume/src/gfx3d.cpp
index fef618acd..8f151d783 100644
--- a/desmume/src/gfx3d.cpp
+++ b/desmume/src/gfx3d.cpp
@@ -2325,7 +2325,7 @@ void gfx3d_VBlankEndSignal(bool skipFrame)
 
 	if (!CommonSettings.showGpu.main)
 	{
-		memset(gfx3d_colorRGBA6665, 0, sizeof(GPU_GetFramebufferWidth() * GPU_GetFramebufferHeight() * sizeof(FragmentColor)));
+		memset(gfx3d_colorRGBA6665, 0, GPU_GetFramebufferWidth() * GPU_GetFramebufferHeight() * sizeof(FragmentColor));
 		return;
 	}