diff --git a/src/elogd.c b/src/elogd.c
index 6a2e7eb9..8298edbd 100755
--- a/src/elogd.c
+++ b/src/elogd.c
@@ -21971,9 +21971,9 @@ int create_thumbnail(LOGBOOK * lbs, char *file_name)
 #ifdef OS_UNIX
    strsubst(str2, sizeof(str2), " ", "\\ ");
    strsubst(str, sizeof(str), " ", "\\ ");
-   sprintf(cmd, "convert %s -thumbnail \"%s\" %s", str2, thumb_size, str);
+   sprintf(cmd, "convert %s\[0-9\] -thumbnail \"%s\" %s", str2, thumb_size, str);
 #else
-   sprintf(cmd, "convert \"%s\" -thumbnail \"%s\" \"%s\"", str2, thumb_size, str);
+   sprintf(cmd, "convert \"%s[0-9]\" -thumbnail \"%s\" \"%s\"", str2, thumb_size, str);
 #endif
 
    sprintf(str, "SHELL \"%s\"", cmd);