diff --git a/sysdeps/alpha/fpu/bits/mathinline.h b/sysdeps/alpha/fpu/bits/mathinline.h
index 0f76027317..22703120b1 100644
--- a/sysdeps/alpha/fpu/bits/mathinline.h
+++ b/sysdeps/alpha/fpu/bits/mathinline.h
@@ -18,7 +18,8 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#if defined (__GNUC__) && !defined (__NO_MATH_INLINES)
+#ifdef __GNUC__
+#if !defined __NO_MATH_INLINES && defined __OPTIMIZE__
 
 extern __inline double
 __copysign (double __x, double __y)
@@ -42,3 +43,4 @@ atan (double __x)
 }
 
 #endif
+#endif