Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -27,11 +27,12 @@
 AX_CHECK_COMPILER_FLAGS(-fno-common, [OBJCFLAGS="$OBJCFLAGS -fno-common"])
 AX_CHECK_COMPILER_FLAGS(-fno-constant-cfstrings, [
 	NO_CONST_CFSTRINGS="-fno-constant-cfstrings"
 	OBJCFLAGS="$OBJCFLAGS -fno-constant-cfstrings"
 ])
-AX_CHECK_COMPILER_FLAGS(-Wshorten-64-to-32, [OBJCFLAGS="$OBJCFLAGS -pipe"])
+AX_CHECK_COMPILER_FLAGS(-Wshorten-64-to-32,
+	[OBJCFLAGS="$OBJCFLAGS -Wshorten-64-to-32"])
 AC_SUBST(NO_CONST_CFSTRINGS)
 
 AC_MSG_CHECKING(whether Objective C compiler supports fast enumeration)
 AC_TRY_COMPILE([
 	@protocol OFFastEnumeration