diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index dd243d2abd875b535d006535232821eefad3460b..297b079ae4d9f0decbabc76d0f7e833e20aadadb 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -375,7 +375,9 @@ int conf_read_simple(const char *name, int def)
 				continue;
 		} else {
 			if (line[0] != '\r' && line[0] != '\n')
-				conf_warning("unexpected data");
+				conf_warning("unexpected data: %.*s",
+					     (int)strcspn(line, "\r\n"), line);
+
 			continue;
 		}
 setsym: