diff --git a/tcl/target/fm4.cfg b/tcl/target/fm4.cfg
index dcf0601f0..e5d0f8d60 100644
--- a/tcl/target/fm4.cfg
+++ b/tcl/target/fm4.cfg
@@ -12,6 +12,8 @@ source [find target/swj-dp.tcl]
 
 if { [info exists CPUTAPID] } {
 	set _CPU_TAPID $CPUTAPID
+} elseif { [using_jtag] } {
+	set _CPU_TAPID 0x4ba00477
 } else {
 	set _CPU_TAPID 0x2ba01477
 }