diff --git a/common/2d/bitblt.cpp b/common/2d/bitblt.cpp
index ee5732097..031afe9a1 100644
--- a/common/2d/bitblt.cpp
+++ b/common/2d/bitblt.cpp
@@ -495,7 +495,7 @@ static void gr_bm_ubitblt0x_rle(int w, int h, int dx, int dy, int sx, int sy, gr
 		sbits += (int)(INTEL_SHORT(src->bm_data[4+(i*data_offset)]));
 
 	for (int y1=0; y1 < h; y1++ ) {
-		gr_rle_expand_scanline_generic( dest, dx, dy+y1,  sbits, sx, sx+w-1);
+		gr_rle_expand_scanline_generic(*dest, dx, dy+y1, sbits, sx, sx+w-1);
 		if ( src->bm_flags & BM_FLAG_RLE_BIG )
 			sbits += (int)INTEL_SHORT(*((short *)&(src->bm_data[4+((y1+sy)*data_offset)])));
 		else
diff --git a/common/2d/rle.cpp b/common/2d/rle.cpp
index 5b6ebd5b6..d5806581b 100644
--- a/common/2d/rle.cpp
+++ b/common/2d/rle.cpp
@@ -447,7 +447,7 @@ grs_bitmap *_rle_expand_texture(const grs_bitmap &bmp)
 }
 
 
-void gr_rle_expand_scanline_generic( grs_bitmap * dest, int dx, int dy, ubyte *src, int x1, int x2 )
+void gr_rle_expand_scanline_generic(grs_bitmap &dest, int dx, int dy, const ubyte *src, int x1, int x2 )
 {
 	int i = 0;
 	int count;
@@ -475,12 +475,12 @@ void gr_rle_expand_scanline_generic( grs_bitmap * dest, int dx, int dy, ubyte *s
 	if ( x1+count > x2 )	{
 		count = x2-x1+1;
 		for ( int j=0; j<count; j++ )
-			gr_bm_pixel(*dest, dx++, dy, color );
+			gr_bm_pixel(dest, dx++, dy, color );
 		return;
 	}
 
 	for ( int j=0; j<count; j++ )
-		gr_bm_pixel(*dest, dx++, dy, color );
+		gr_bm_pixel(dest, dx++, dy, color );
 	i += count;
 
 	while( i <= x2 )		{
@@ -496,12 +496,12 @@ void gr_rle_expand_scanline_generic( grs_bitmap * dest, int dx, int dy, ubyte *s
 		// we know have '*count' pixels of 'color'.
 		if ( i+count <= x2 )	{
 			for ( int j=0; j<count; j++ )
-				gr_bm_pixel(*dest, dx++, dy, color );
+				gr_bm_pixel(dest, dx++, dy, color );
 			i += count;
 		} else {
 			count = x2-i+1;
 			for ( int j=0; j<count; j++ )
-				gr_bm_pixel(*dest, dx++, dy, color );
+				gr_bm_pixel(dest, dx++, dy, color );
 			i += count;
 		}
 	}
diff --git a/common/include/rle.h b/common/include/rle.h
index c70d4773e..017f0a8ae 100644
--- a/common/include/rle.h
+++ b/common/include/rle.h
@@ -79,7 +79,7 @@ void rle_cache_close();
 void rle_cache_flush();
 void rle_swap_0_255(grs_bitmap *bmp);
 void rle_remap(grs_bitmap *bmp, array<color_t, 256> &colormap);
-void gr_rle_expand_scanline_generic( grs_bitmap * dest, int dx, int dy, ubyte *src, int x1, int x2 );
+void gr_rle_expand_scanline_generic(grs_bitmap &dest, int dx, int dy, const ubyte *src, int x1, int x2 );
 
 #endif