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-rw-r--r--ext/fiddle/conversions.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/ext/fiddle/conversions.h b/ext/fiddle/conversions.h
index d0a08d6bc0..cbc610bad2 100644
--- a/ext/fiddle/conversions.h
+++ b/ext/fiddle/conversions.h
@@ -33,11 +33,11 @@ VALUE generic_to_value(VALUE rettype, fiddle_generic retval);
#define GENERIC2VALUE(_type, _retval) generic_to_value((_type), (_retval))
#if SIZEOF_VOIDP == SIZEOF_LONG
-# define PTR2NUM(x) (ULONG2NUM((unsigned long)(x)))
+# define PTR2NUM(x) (LONG2NUM((long)(x)))
# define NUM2PTR(x) ((void*)(NUM2ULONG(x)))
#else
/* # error --->> Ruby/DL2 requires sizeof(void*) == sizeof(long) to be compiled. <<--- */
-# define PTR2NUM(x) (ULL2NUM((unsigned long long)(x)))
+# define PTR2NUM(x) (LL2NUM((LONG_LONG)(x)))
# define NUM2PTR(x) ((void*)(NUM2ULL(x)))
#endif