diff --git a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/blackmagic_flash.sh b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/blackmagic_flash.sh
index cca844d9f0..6bf71b3ed7 100755
--- a/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/blackmagic_flash.sh
+++ b/libuavcan_drivers/lpc11c24/test_olimex_lpc_p11c24/blackmagic_flash.sh
@@ -12,7 +12,7 @@ elf=build/firmware.elf
 
 arm-none-eabi-size $elf || exit 1
 
-tmpfile=$(tempfile)
+tmpfile=fwupload.tempfile
 cat > $tmpfile <<EOF
 target extended-remote $PORT
 mon swdp_scan
@@ -22,3 +22,4 @@ kill
 EOF
 
 arm-none-eabi-gdb $elf --batch -x $tmpfile
+rm $tmpfile