diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 4030412637ad..286a2c0af02a 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -4614,6 +4614,8 @@ static int disas_funcs(const char *funcs)
 	char *cmd;
 
 	cross_compile = getenv("CROSS_COMPILE");
+	if (!cross_compile)
+		cross_compile = "";
 
 	objdump_str = "%sobjdump -wdr %s | gawk -M -v _funcs='%s' '"
 			"BEGIN { split(_funcs, funcs); }"