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-rw-r--r--src/2geom/isnan.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/2geom/isnan.h b/src/2geom/isnan.h
index a2906be15..52085a25f 100644
--- a/src/2geom/isnan.h
+++ b/src/2geom/isnan.h
@@ -27,6 +27,8 @@
*/
#if defined(__isnan)
+# define is_nan(_a) (__isnan(_a))
+#elif defined(__APPLE__) && __GNUC__ == 3
# define is_nan(_a) (__isnan(_a)) /* MacOSX/Darwin definition < 10.4 */
#elif defined(WIN32) || defined(_isnan)
# define is_nan(_a) (_isnan(_a)) /* Win32 definition */