diff --git a/src/if_sniff.h b/src/if_sniff.h
new file mode 100644
index 0000000..901b06a
--- /dev/null
+++ b/src/if_sniff.h
@@ -0,0 +1,18 @@
+/*
+ * if_sniff.h Interface between Vim and SNiFF+
+ *
+ * $Id$
+ */
+
+#ifndef __if_sniff_h__
+#define __if_sniff_h__
+
+extern int  want_sniff_request;
+extern int  sniff_request_waiting;
+extern int  sniff_connected;
+extern int  fd_from_sniff;
+extern void sniff_disconnect __ARGS((int immediately));
+extern void ProcessSniffRequests __ARGS((void));
+extern void ex_sniff __ARGS((exarg_T *eap));
+
+#endif