diff --git a/Python/importdl.c b/Python/importdl.c
index 01d9c169866..e802df1a54a 100644
--- a/Python/importdl.c
+++ b/Python/importdl.c
@@ -54,6 +54,10 @@ extern int verbose; /* Defined in pythonrun.c */
 
 /* Configure dynamic linking */
 
+#ifdef __hpux
+#define hpux
+#endif
+
 #ifdef hpux
 #define DYNAMIC_LINK
 #include <errno.h>