diff --git a/src/editor/editcmd.c b/src/editor/editcmd.c
index c7e5f7028..71f2c5b0c 100644
--- a/src/editor/editcmd.c
+++ b/src/editor/editcmd.c
@@ -2331,8 +2331,8 @@ void
 edit_block_copy_cmd (WEdit * edit)
 {
     off_t start_mark, end_mark, current = edit->buffer.curs1;
-    off_t mark1, mark2;
-    long c1, c2;
+    off_t mark1 = 0, mark2 = 0;
+    long c1 = 0, c2 = 0;
     off_t size;
     unsigned char *copy_buf;