diff --git a/bin/compose-core b/bin/compose-core
index 0dddb71..a63ace8 100755
--- a/bin/compose-core
+++ b/bin/compose-core
@@ -1776,8 +1776,7 @@ service_ensure_image_ready() {
     local service="$1" \
           cache_file="$CACHEDIR/$FUNCNAME.cache.$1.$(H "$COMBINED_HASH" "$(cat "$_CURRENT_DOCKER_COMPOSE")")" \
           master_service service_def service_image service_build service_dockerfile image \
-          specified_image specified_image_id charm_image_name hash \
-          service_quoted
+          specified_image specified_image_id charm_image_name hash
 
     if [ -e "$cache_file" ]; then
         #debug "$FUNCNAME: cache hit ($*)"
@@ -1812,7 +1811,6 @@ service_ensure_image_ready() {
         err "Could not get docker-compose service definition for $DARKYELLOW$service$NORMAL."
         return 1
     }
-    local service_quoted=${service//./\\.}
     if specified_image=$(e "$service_def" | shyaml get-value image 2>/dev/null); then
         if [[ "$specified_image" == "$charm_image_name:"* ]]; then
             ## Assume we already did the change
@@ -1842,7 +1840,7 @@ service_ensure_image_ready() {
         type=fetch
 
         ## replace image by charm image
-        yq -i ".services.[\"${service_quoted}\"].image = \"${charm_image_name}:${hash}\"" \
+        yq -i ".services.[\"${service}\"].image = \"${charm_image_name}:${hash}\"" \
            "$_CURRENT_DOCKER_COMPOSE" || return 1
     else
 
@@ -1857,8 +1855,8 @@ service_ensure_image_ready() {
         hash=$(get_build_hash "$src") || return 1
         type=build
         ## delete build key from service_def and add image to charm_image_name
-        yq -i "del(.services.[\"${service_quoted}\"].build) |
-                        .services.[\"${service_quoted}\"].image = \"${charm_image_name}:${hash}\"" \
+        yq -i "del(.services.[\"${service}\"].build) |
+                        .services.[\"${service}\"].image = \"${charm_image_name}:${hash}\"" \
                             "$_CURRENT_DOCKER_COMPOSE" || return 1
 
     fi