diff --git a/Meta/serenity.sh b/Meta/serenity.sh
index 09525406e6..048b16fda0 100755
--- a/Meta/serenity.sh
+++ b/Meta/serenity.sh
@@ -7,7 +7,7 @@ print_help() {
     NAME=$(basename "$ARG0")
     cat <<EOF
 Usage: $NAME COMMAND [TARGET] [ARGS...]
-  Supported TARGETs: i686 (default), x86_64, lagom
+  Supported TARGETs: i686, x86_64, lagom. Defaults to SERENITY_ARCH, or i686 if not set.
   Supported COMMANDs:
     build:      Compiles the target binaries, [ARGS...] are passed through to ninja
     install:    Installs the target binary
@@ -84,7 +84,7 @@ fi
 if [ -n "$1" ]; then
     TARGET="$1"; shift
 else
-    TARGET="i686"
+    TARGET="${SERENITY_ARCH:-"i686"}"
 fi
 CMD_ARGS=( "$@" )
 CMAKE_ARGS=()