1 files changed, 4 insertions, 2 deletions

diff --git a/src/font.c b/src/font.c
index 81a4914ba79..4511df90b83 100644
--- a/src/font.c
+++ b/src/font.c
@@ -1406,6 +1406,8 @@ font_parse_fcname (name, font)
         }
       else
         {
+          char *keyhead = p0;
+
           if (memcmp (p0 + 1, "pixelsize=", 10) == 0)
             prop = FONT_SIZE_INDEX;
           else
@@ -1423,8 +1425,8 @@ font_parse_fcname (name, font)
               else if (prop >= 0)
                 Ffont_put (font, key, val);
               else
-                bcopy (p0 - 1, copy, p1 - p0 + 1);
-              copy += p1 - p0 + 1;
+                bcopy (keyhead, copy, p1 - keyhead);
+              copy += p1 - keyhead;
             }
         }
       p0 = p1;