diff --git a/inc/display.h b/inc/display.h
index aa419ef..09b1a4f 100755
--- a/inc/display.h
+++ b/inc/display.h
@@ -79,3 +79,11 @@ extern DLword *DisplayRegion68k;
 #undef DISPLAYBUFFER
 #endif /* XWINDOW */
 
+void flush_display_buffer();
+void flush_display_lineregion(UNSIGNED x, DLword *ybase, UNSIGNED w, UNSIGNED h);
+void flush_display_region(int x, int y, int w, int h);
+void flush_display_ptrregion(DLword *ybase, UNSIGNED bitoffset, UNSIGNED w, UNSIGNED h);
+
+#ifdef BYTESWAP
+void byte_swapped_displayregion(int x, int y, int w, int h);
+#endif
diff --git a/src/initdsp.c b/src/initdsp.c
index 7d60f32..c2c1a21 100644
--- a/src/initdsp.c
+++ b/src/initdsp.c
@@ -756,7 +756,7 @@ void byte_swapped_displayregion(int x, int y, int w, int h)
 /*									*/
 /************************************************************************/
 
-void flush_display_lineregion(UNSIGNED x, UNSIGNED ybase, UNSIGNED w, UNSIGNED h)
+void flush_display_lineregion(UNSIGNED x, DLword *ybase, UNSIGNED w, UNSIGNED h)
 #ifdef I386
 { /*flush_display_buffer(); */
   int y;
@@ -805,7 +805,7 @@ void flush_display_lineregion(UNSIGNED x, UNSIGNED ybase, UNSIGNED w, UNSIGNED h
 
 #define BITSPERWORD 16
 
-void flush_display_ptrregion(UNSIGNED ybase, UNSIGNED bitoffset, UNSIGNED w, UNSIGNED h)
+void flush_display_ptrregion(DLword *ybase, UNSIGNED bitoffset, UNSIGNED w, UNSIGNED h)
 #ifdef I386
 { flush_display_buffer(); }
 #else