diff --git a/src/v_font.cpp b/src/v_font.cpp
index 176b5097d..c1923e4ac 100644
--- a/src/v_font.cpp
+++ b/src/v_font.cpp
@@ -1125,7 +1125,7 @@ void FSingleLumpFont::LoadFON2 (int lump, const BYTE *data)
 		SpaceWidth = totalwidth * 2 / (3 * count);
 	}
 
-	memcpy(PaletteData, palette, 768);
+	memcpy(PaletteData, palette, (ActiveColors+1)*3);
 
 	data_p = palette + (ActiveColors+1)*3;