diff --git a/libsrc/geos/graph/drawline.s b/libsrc/geos/graph/drawline.s
index 874a58bbd..06d05f663 100644
--- a/libsrc/geos/graph/drawline.s
+++ b/libsrc/geos/graph/drawline.s
@@ -2,7 +2,7 @@
 ;
 ; Maciej 'YTM/Elysium' Witkowiak
 ;
-; 29.10.99, 15.08.2003
+; 29.10.99, 5.03.2003
 
 ; void DrawLine         (char mode, struct window *mywindow);
 
@@ -24,5 +24,8 @@ _DrawLine:
 	    PopW r2
 	    jsr popa
 	    sta tmp1
+	    clc
 	    bit tmp1
-	    jmp DrawLine
+	    bvc @1
+	    sec
+@1:	    jmp DrawLine
diff --git a/libsrc/geos/graph/drawpoint.s b/libsrc/geos/graph/drawpoint.s
index 5492c4831..7c212176d 100644
--- a/libsrc/geos/graph/drawpoint.s
+++ b/libsrc/geos/graph/drawpoint.s
@@ -2,7 +2,7 @@
 ;
 ; Maciej 'YTM/Elysium' Witkowiak
 ;
-; 29.10.99, 16.8.2003
+; 29.10.99, 05.3.2003
 
 ; void DrawPoint	(char mode, struct pixel *mypixel);
 
@@ -18,5 +18,8 @@ _DrawPoint:
 	    jsr PointRegs
 	    jsr popa
 	    sta tmp1
+	    clc
 	    bit tmp1
-	    jmp DrawPoint
+	    bvc @1
+	    sec
+@1:	    jmp DrawPoint