diff --git a/schhist/gitsch2ps b/schhist/gitsch2ps
index 64d4cf0..adac776 100755
--- a/schhist/gitsch2ps
+++ b/schhist/gitsch2ps
@@ -116,7 +116,7 @@ fi
     rm -f *.ps
     $sanitize_profile "$tmp/$pro" || exit
     $sanitize_schem "$tmp/$schem" || exit
-    eeschema --plot "$tmp/$schem"
+    eeschema --plot=ps --plot-bw "$tmp/$schem"
 ) || exit
 
 mkdir -p "$outdir"
diff --git a/schhist/ppmdiff/.gitignore b/schhist/ppmdiff/.gitignore
new file mode 100644
index 0000000..eb4b019
--- /dev/null
+++ b/schhist/ppmdiff/.gitignore
@@ -0,0 +1 @@
+ppmdiff