diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 3e37e585427..9c4658eb22a 100755
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -78,6 +78,7 @@ check_symbol_exists(FE_INEXACT "fenv.h" HAVE_DECL_FE_INEXACT)
 
 check_include_file(mach/mach.h HAVE_MACH_MACH_H)
 check_include_file(histedit.h HAVE_HISTEDIT_H)
+check_include_file(CrashReporterClient.h HAVE_CRASHREPORTERCLIENT_H)
 
 # library checks
 if( NOT PURE_WINDOWS )
diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index ebe33d5fea3..ccdba3dd058 100644
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -17,7 +17,7 @@
 #cmakedefine HAVE_BACKTRACE ${HAVE_BACKTRACE}
 
 /* Define to 1 if you have the <CrashReporterClient.h> header file. */
-#undef HAVE_CRASHREPORTERCLIENT_H
+#cmakedefine HAVE_CRASHREPORTERCLIENT_H
 
 /* can use __crashreporter_info__ */
 #undef HAVE_CRASHREPORTER_INFO