diff --git a/Include/floatobject.h b/Include/floatobject.h
index 46ef6e6..e240fdb 100644
--- a/Include/floatobject.h
+++ b/Include/floatobject.h
@@ -110,6 +110,8 @@
 /* free list api */
 PyAPI_FUNC(int) PyFloat_ClearFreeList(void);
 
+PyAPI_FUNC(void) _PyFloat_DebugMallocStats(FILE* out);
+
 /* Format the object based on the format_spec, as defined in PEP 3101
    (Advanced String Formatting). */
 PyAPI_FUNC(int) _PyFloat_FormatAdvancedWriter(