diff --git a/libbb/bb_askpass.c b/libbb/bb_askpass.c
index cf384e5..097a0a2 100644
--- a/libbb/bb_askpass.c
+++ b/libbb/bb_askpass.c
@@ -60,7 +60,7 @@
 		   (read did not overwrite it) */
 		do {
 			if (passwd[i] == '\r' || passwd[i] == '\n')
-				passwd[i] = 0;
+				passwd[i] = '\0';
 		} while (passwd[i++]);
 	}