diff -ur gnuplot-3.7.1.orig/win/wgraph.c gnuplot-3.7.1/win/wgraph.c
--- gnuplot-3.7.1.orig/win/wgraph.c	Thu Aug 19 15:13:09 1999
+++ gnuplot-3.7.1/win/wgraph.c	Wed Nov 17 17:29:56 1999
@@ -366,6 +366,7 @@
 		for (i=0; i<WGNUMPENS; i++)
 		{
 			lpgw->hpen[i] = CreatePenIndirect((LOGPEN FAR *)&lpgw->monopen[i+2]);
+            		lpgw->hsolidpen[i] = CreatePenIndirect((LOGPEN FAR *)&lpgw->monopen[2]);
 			}
 		/* find number of solid, unit width line styles */
 		for (i=0; i<WGNUMPENS && lpgw->monopen[i+2].lopnStyle==PS_SOLID