diff --git a/ext/imap/php_imap.c b/ext/imap/php_imap.c
index 7aff4ce5d4f..59bb710201a 100644
--- a/ext/imap/php_imap.c
+++ b/ext/imap/php_imap.c
@@ -2960,7 +2960,7 @@ PHP_FUNCTION(imap_fetch_overview)
 				}
 				if (env->from) {
 					env->from->next=NULL;
-					address = '\0';
+					address[0] = '\0';
 					rfc822_write_address(address, env->from);
 					add_property_string(myoverview, "from", address, 1);
 				}