diff --git a/Objects/complexobject.c b/Objects/complexobject.c
index c87b9e8..7f40ed6 100644
--- a/Objects/complexobject.c
+++ b/Objects/complexobject.c
@@ -8,6 +8,10 @@
 #include "Python.h"
 #include "structmember.h"
 
+#ifdef HAVE_IEEEFP_H
+#include <ieeefp.h>
+#endif
+
 #ifndef WITHOUT_COMPLEX
 
 /* Precisions used by repr() and str(), respectively.