diff --git a/Include/Python.h b/Include/Python.h
index 2ff4c31..60258ef 100644
--- a/Include/Python.h
+++ b/Include/Python.h
@@ -73,6 +73,7 @@
 #if defined(PYMALLOC_DEBUG) && !defined(WITH_PYMALLOC)
 #error "PYMALLOC_DEBUG requires WITH_PYMALLOC"
 #endif
+#include "pymath.h"
 #include "pymem.h"
 
 #include "object.h"