diff --git a/scripts/docker/app/functions/function_install_app.sh b/scripts/docker/app/functions/function_install_app.sh
index 8becea0..75bcabe 100755
--- a/scripts/docker/app/functions/function_install_app.sh
+++ b/scripts/docker/app/functions/function_install_app.sh
@@ -9,6 +9,22 @@ dockerInstallApp()
     local app_name_ucfirst="$(tr '[:lower:]' '[:upper:]' <<< ${app_name:0:1})${app_name:1}"
     local installFuncName="install${app_name_ucfirst}"
 
+    # App slugs are lowercase (e.g. "libreportal"), but installer functions keep
+    # their own internal capitalisation (e.g. installLibrePortal) — capitalising
+    # only the first letter can't reproduce that camelCase. If the naive name
+    # isn't a defined function, resolve it case-insensitively against the real
+    # function table so any compound brand/app name (LibrePortal, …) just works.
+    if ! declare -F "$installFuncName" >/dev/null 2>&1; then
+        local _resolved
+        _resolved="$(compgen -A function | grep -ixF "install${app_name}" | head -n1)"
+        [[ -n "$_resolved" ]] && installFuncName="$_resolved"
+    fi
+
+    if ! declare -F "$installFuncName" >/dev/null 2>&1; then
+        isError "No installer function found for app '${app_name}' (looked for ${installFuncName})."
+        return 1
+    fi
+
     if [[ "$reset_network" == "true" ]]; then
         export LIBREPORTAL_RESET_NETWORK=1
         if declare -f ipRemoveFromDatabase >/dev/null 2>&1; then