diff --git a/libmacos/macos/devices.h b/libmacos/macos/devices.h
index 7434944..7a02963 100644
--- a/libmacos/macos/devices.h
+++ b/libmacos/macos/devices.h
@@ -116,6 +116,16 @@ static inline OSErr PBWriteSync(ParamBlockRec_t* paramBlock)
 	return ret;
 }
 
+static inline OSErr DrvrRemove(int refNum)
+{
+	register OSErr ret asm("%%d0");
+	asm("move.l %1, %%d0\n"
+		Trap(_DrvrRemove)
+	    : "=d" (ret) : "g" (refNum) : UNPRESERVED_REGS);
+
+	return ret;
+}
+
 extern OSErr OpenDriver(ConstStr255Param name, short *drvrRefNum);
 extern OSErr CloseDriver(short refNum);
 extern OSErr SerGetBuf(short refNum, long *count);
diff --git a/libmacos/macos/traps.h b/libmacos/macos/traps.h
index 6d126eb..fd9c6a3 100644
--- a/libmacos/macos/traps.h
+++ b/libmacos/macos/traps.h
@@ -23,6 +23,7 @@
 #define	_PBReadSync	0xA002
 #define	_PBWriteSync	0xA003
 #define	_PBStatusSync	0xA005
+#define _DvrRemove	0xA03E
 #define	_ReadXPRam	0xA051
 #define	_SlotManager	0xA06E
 #define	_SCSIDispatch	0xA815