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-rw-r--r--malloc/obstack.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/malloc/obstack.h b/malloc/obstack.h
index 2a708c53a9..a44224443f 100644
--- a/malloc/obstack.h
+++ b/malloc/obstack.h
@@ -119,8 +119,12 @@ extern "C" {
 #endif
 
 #ifndef __INT_TO_PTR
+#if defined __STDC__ && __STDC__
+# define __INT_TO_PTR(P) ((void *) ((P) + (char *) 0))
+#else
 # define __INT_TO_PTR(P) ((P) + (char *) 0)
 #endif
+#endif
 
 /* We need the type of the resulting object.  If __PTRDIFF_TYPE__ is
    defined, as with GNU C, use that; that way we don't pollute the