diff --git a/lsio/unifi-controller/docker-compose.yaml b/lsio/unifi-controller/docker-compose.yaml
index 8769ea4..7a1268d 100644
--- a/lsio/unifi-controller/docker-compose.yaml
+++ b/lsio/unifi-controller/docker-compose.yaml
@@ -15,6 +15,8 @@ services:
       - PGID=${PGID:-100}
       # Optionally change the Java memory limit (-Xmx) (default is 1024M).
       - MEM_LIMIT=1024M # optional
+      # Optionally change the Java initial memory (-Xms) (default is 1024M).
+      - MEM_STARTUP=1024M # optional
     volumes:
       # All Unifi data stored here
       - ${BASEDIR:-/volume1/docker}/unifi-controller/config:/config
diff --git a/lsio/unifi-controller/docker-run.sh b/lsio/unifi-controller/docker-run.sh
index e904bf5..fd09102 100644
--- a/lsio/unifi-controller/docker-run.sh
+++ b/lsio/unifi-controller/docker-run.sh
@@ -8,6 +8,7 @@ docker run -d \
   -e PUID=${PUID:-1024} `# for GroupID` \
   -e PGID=${PGID:-100} `# for UserID` \
   -e MEM_LIMIT=1024M `# optional` `# Optionally change the Java memory limit (-Xmx) (default is 1024M).` \
+  -e MEM_STARTUP=1024M `# optional` `# Optionally change the Java initial memory (-Xms) (default is 1024M).` \
   -p 3478:3478/udp `# Unifi STUN port` \
   -p 10001:10001/udp `# Required for AP discovery` \
   -p 8080:8080 `# Required for device communication` \