(concat) [!__GNUC__]: Add prototype.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/fns.c b/src/fns.c
index 507bf229e47..3aa8cf4f6b4 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -392,6 +392,8 @@ Symbols are also allowed; their print names are used instead.  */)
    the arguments for the invocations of this function, whereas it
    expects these values on the stack.  */
 static Lisp_Object concat () __attribute__((noinline));
+#else  /* !__GNUC__ */
+static Lisp_Object concat ();
 #endif
 
 /* ARGSUSED */