Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -431,11 +431,11 @@
 AC_CHECK_FUNC(madvise, [
 	AC_DEFINE(HAVE_MADVISE, 1, [Whether we have madvise])
 ])
 
 AS_IF([test x"$objc_runtime" = x"Apple"], [
-	AC_CHECK_HEADER(Foundation/Foundation.h, [
+	AC_CHECK_HEADER(Foundation/NSObject.h, [
 		AC_SUBST(FOUNDATION_COMPAT_M, "foundation-compat.m")
 	])
 ])
 
 AS_IF([test x"$GOBJC" = x"yes"], [