diff --git a/README.md b/README.md
index fd0b552..d70c60b 100644
--- a/README.md
+++ b/README.md
@@ -93,7 +93,7 @@ Set default system timezone. All available timezones can be found in the `/usr/s
 ##### `EXPANDROOT`=true
 Expand the root partition and filesystem automatically on first boot.
 
-##### `ENABLE_SWAP`=true
+##### `ENABLE_DPHYSSWAP`=true
 Enable swap. The size of the swapfile is chosen relative to the size of the root partition. It'll use the `dphys-swapfile` package for that.
 
 ##### `ENABLE_QEMU`=false
diff --git a/bootstrap.d/50-firstboot.sh b/bootstrap.d/50-firstboot.sh
index b8c31a3..57331ca 100644
--- a/bootstrap.d/50-firstboot.sh
+++ b/bootstrap.d/50-firstboot.sh
@@ -19,7 +19,7 @@ if [ "$EXPANDROOT" = true ] ; then
     cat files/firstboot/30-expandroot.sh >> "${ETC_DIR}/rc.firstboot"
 
     # Restart dphys-swapfile so the size of the swap file is relative to the resized root partition
-    if [ "$ENABLE_SWAP" = true ] ; then
+    if [ "$ENABLE_DPHYSSWAP" = true ] ; then
       cat files/firstboot/31-restart-dphys-swapfile.sh >> "${ETC_DIR}/rc.firstboot"
     fi
   else
diff --git a/rpi23-gen-image.sh b/rpi23-gen-image.sh
index 2f90f95..fe4abdc 100755
--- a/rpi23-gen-image.sh
+++ b/rpi23-gen-image.sh
@@ -83,7 +83,7 @@ USER_PASSWORD=${USER_PASSWORD:=raspberry}
 DEFLOCAL=${DEFLOCAL:="en_US.UTF-8"}
 TIMEZONE=${TIMEZONE:="Europe/Berlin"}
 EXPANDROOT=${EXPANDROOT:=true}
-ENABLE_SWAP=${ENABLE_SWAP:=true}
+ENABLE_DPHYSSWAP=${ENABLE_DPHYSSWAP:=true}
 
 # Keyboard settings
 XKB_MODEL=${XKB_MODEL:=""}
@@ -486,7 +486,7 @@ if [ "$EXPANDROOT" = true ] ; then
 fi
 
 # Add dphys-swapfile package, required to enable swap
-if [ "$ENABLE_SWAP" = true ] ; then
+if [ "$ENABLE_DPHYSSWAP" = true ] ; then
   APT_INCLUDES="${APT_INCLUDES},dphys-swapfile"
 fi