diff --git a/libcxxabi/test/catch_ptr_02.pass.cpp b/libcxxabi/test/catch_ptr_02.pass.cpp
--- a/libcxxabi/test/catch_ptr_02.pass.cpp
+++ b/libcxxabi/test/catch_ptr_02.pass.cpp
@@ -17,6 +17,7 @@
 // XFAIL: stdlib=apple-libc++ && target={{.+}}-apple-macosx10.9
 
 #include <cassert>
+#include <stdint.h>
 
 #if __cplusplus < 201103L
 #define DISABLE_NULLPTR_TESTS
@@ -136,7 +137,7 @@
         assert(false);
     }
     catch (base2 *p) {
-        assert ((unsigned long)p == 12+sizeof(base1));
+        assert ((uintptr_t)p == 12+sizeof(base1));
     }
     catch (...)
     {