diff --git a/src/emu/bus/ecbbus/ecbbus.c b/src/emu/bus/ecbbus/ecbbus.c
index edcdd63db30..6dbfe0c8562 100644
--- a/src/emu/bus/ecbbus/ecbbus.c
+++ b/src/emu/bus/ecbbus/ecbbus.c
@@ -270,6 +270,9 @@ WRITE_LINE_MEMBER( ecbbus_device::nmi_w )
 //  SLOT_INTERFACE( ecbbus_cards )
 //-------------------------------------------------
 
+// slot devices
+#include "grip.h"
+
 SLOT_INTERFACE_START( ecbbus_cards )
 	SLOT_INTERFACE("grip21", ECB_GRIP21)
 /*  SLOT_INTERFACE("grip25", ECB_GRIP25)
diff --git a/src/emu/bus/ecbbus/ecbbus.h b/src/emu/bus/ecbbus/ecbbus.h
index 78a96e4cf36..6e8d3412d6a 100644
--- a/src/emu/bus/ecbbus/ecbbus.h
+++ b/src/emu/bus/ecbbus/ecbbus.h
@@ -196,9 +196,6 @@ public:
 };
 
 
-// slot devices
-#include "grip.h"
-
 SLOT_INTERFACE_EXTERN( ecbbus_cards );