diff --git a/gcc/real.c b/gcc/real.c
index 5ef2ef19cc3..47193f9c60c 100644
--- a/gcc/real.c
+++ b/gcc/real.c
@@ -261,8 +261,8 @@ void asctoe (), asctoe24 (), asctoe53 (), asctoe64 ();
 void etoasc (), e24toasc (), e53toasc (), e64toasc ();
 void etoe64 (), etoe53 (), etoe24 (), e64toe (), e53toe (), e24toe ();
 void mtherr ();
-unsigned EMUSHORT ezero[], ehalf[], eone[], etwo[];
-unsigned EMUSHORT elog2[], esqrt2[];
+extern unsigned EMUSHORT ezero[], ehalf[], eone[], etwo[];
+extern unsigned EMUSHORT elog2[], esqrt2[];
 
 /* Pack output array with 32-bit numbers obtained from
    array containing 16-bit numbers, swapping ends if required. */