diff --git a/src/simulator/cairo-wideint-private.h b/src/simulator/cairo-wideint-private.h
index 4d0303c58..b8b806d7d 100644
--- a/src/simulator/cairo-wideint-private.h
+++ b/src/simulator/cairo-wideint-private.h
@@ -34,6 +34,7 @@
 
 #include "ns3/simulator-config.h"
 #define cairo_private 
+#define HAVE_UINT64_T 1
 
 #if   HAVE_STDINT_H
 # include <stdint.h>
@@ -220,7 +221,7 @@ cairo_uint128_t I	_cairo_uint128_negate (cairo_uint128_t a);
 #define			_cairo_uint128_negative(a)  (_cairo_uint64_negative(a.hi))
 cairo_uint128_t I	_cairo_uint128_not (cairo_uint128_t a);
 
-#define			_cairo_uint128_to_int128_(i)	(i)
+#define			_cairo_uint128_to_int128(i)	(i)
 #define			_cairo_int128_to_uint128(i)	(i)
 
 cairo_int128_t  I	_cairo_int32_to_int128 (int32_t i);