diff --git a/lib/make/mb_openmsx.mk b/lib/make/mb_openmsx.mk
index 1275e1b..aa524a9 100644
--- a/lib/make/mb_openmsx.mk
+++ b/lib/make/mb_openmsx.mk
@@ -49,7 +49,7 @@ define _mb_openmsx_run
 	SPEED=$(MB_OPENMSX_SPEED) \
 	RENDERER=$(MB_OPENMSX_RENDERER) \
 	THROTTLE=$(MB_OPENMSX_THROTTLE) \
-	RECORD_SESSION=$(if $(filter on,$(MB_OPENMSX_RECORDER)),"$(1)-omsx/output.avi") \
+	RECORDER=$(if $(filter on,$(MB_OPENMSX_RECORDER)),"$(1)-omsx/output.avi") \
 	OPENMSX_USER_DATA="$(1)-omsx/share" \
 	$(PATH_OPENMSX)/openmsx \
 		-machine $(2) \
diff --git a/lib/openmsx/share/scripts/boot_env.tcl b/lib/openmsx/share/scripts/boot_env.tcl
index c9dd304..d67aed9 100644
--- a/lib/openmsx/share/scripts/boot_env.tcl
+++ b/lib/openmsx/share/scripts/boot_env.tcl
@@ -21,8 +21,8 @@
 # JOYPORTB=mouse
 # Inserts mouse in joyportb.
 #
-# RECORD_SESSION=bin/output.avi
-# Enables the session video recorder.
+# RECORDER=bin/output.avi
+# Enables the the video recorder.
 #
 
 if {[info exists ::env(RENDERER)] && ([string trim $::env(RENDERER)] != "")} {
@@ -67,9 +67,9 @@ if {[info exists ::env(JOYPORTB)] && ([string trim $::env(JOYPORTB)] != "")} {
 	}
 }
 
-if {[info exists ::env(RECORD_SESSION)] && ([string trim $::env(RECORD_SESSION)] != "")} {
-	if {[catch {after time 1 "record start [string trim $::env(RECORD_SESSION)]"} err_msg]} {
-		puts stderr "error: env.RECORD_SESSION value $err_msg"
+if {[info exists ::env(RECORDER)] && ([string trim $::env(RECORDER)] != "")} {
+	if {[catch {after time 1 "record start [string trim $::env(RECORDER)]"} err_msg]} {
+		puts stderr "error: env.RECORDER value $err_msg"
 		exit 1
 	}
 }