diff --git a/scripts/sign-file.c b/scripts/sign-file.c
index fa3fa59db666..8f06328d1cd1 100644
--- a/scripts/sign-file.c
+++ b/scripts/sign-file.c
@@ -92,6 +92,7 @@ static void display_openssl_errors(int l)
 	}
 }
 
+#ifndef OPENSSL_NO_ENGINE
 static void drain_openssl_errors(void)
 {
 	const char *file;
@@ -101,6 +102,7 @@ static void drain_openssl_errors(void)
 		return;
 	while (ERR_get_error_line(&file, &line)) {}
 }
+#endif
 
 #define ERR(cond, fmt, ...)				\
 	do {						\