diff --git a/ext/f2c_libs/err.c b/ext/f2c_libs/err.c
index b81ffc111..d93e80d05 100644
--- a/ext/f2c_libs/err.c
+++ b/ext/f2c_libs/err.c
@@ -44,7 +44,7 @@ int f__scale;
 char *f__icptr;
 
 /*error messages*/
-char *F_err[] =
+static char *F_err[] =
 {
 	"error in format",				/* 100 */
 	"illegal unit number",				/* 101 */