diff --git a/second/glue.S b/second/glue.S
index 58c08fe..a0da052 100644
--- a/second/glue.S
+++ b/second/glue.S
@@ -393,6 +393,16 @@ PBControlSync:
 	unlk	%fp
 	rts
 
+	/* OSErr PBStatusSync(ParmBlkPtr paramBlock) */
+
+	.global PBStatusSync
+PBStatusSync:
+	link	%fp, #0
+	move.l	8(%fp), %a0
+	dc.w	0xA005		/* PBStatusSync */
+	unlk	%fp
+	rts
+
 	/* void SysError(short errorCode) */
 
 	.global SysError
diff --git a/second/glue.h b/second/glue.h
index f8a3c25..9203fe1 100644
--- a/second/glue.h
+++ b/second/glue.h
@@ -246,11 +246,19 @@ extern OSErr Gestalt(unsigned long selector, long * response);
 extern void ReadLocation(MachineLocation * loc);
 extern void* NewPtr(unsigned long byteCount);
 extern void DisposePtr(void* ptr);
+
+enum {
+	kSERDInputCount	= 2,	/* get available characters count (SerGetBuf) */
+	kSERDStatus	= 8,	/* get status information (SerStatus) */
+	kSERDVersion	= 9,	/* get driver version */
+};
+
 extern OSErr PBReadSync(ParamBlockRec_t* paramBlock);
 extern OSErr PBWriteSync(ParamBlockRec_t* paramBlock);
 extern OSErr PBOpenSync(ParmBlkPtr paramBlock);
 extern OSErr PBCloseSync(ParmBlkPtr paramBlock);
 extern OSErr PBControlSync(ParmBlkPtr paramBlock);
+extern OSErr PBStatusSync(ParmBlkPtr paramBlock);
 extern void SysError(short errorCode);
 
 typedef u_int32_t	KeyMap[4];