diff --git a/tcl/target/klx.cfg b/tcl/target/klx.cfg
index 7dd0404f9..1a2ee6798 100644
--- a/tcl/target/klx.cfg
+++ b/tcl/target/klx.cfg
@@ -12,11 +12,11 @@ if { [info exists CHIPNAME] } {
 }
 
 # Work-area is a space in RAM used for flash programming
-# By default use 4kB
+# By default use 1KiB
 if { [info exists WORKAREASIZE] } {
    set _WORKAREASIZE $WORKAREASIZE
 } else {
-   set _WORKAREASIZE 0x1000
+   set _WORKAREASIZE 0x400
 }
 
 if { [info exists CPUTAPID] } {