diff --git a/src/freedombone-image b/src/freedombone-image
index 2c4682193e0cfe9bd0a31f6492f9852a793c0705..f3474f7d13bf9521a93975c6b1eb421bc9fe1f59 100755
--- a/src/freedombone-image
+++ b/src/freedombone-image
@@ -74,7 +74,7 @@ IMAGE_NAME='full'
 USERNAME="$USER"
 PASSWORD=
 
-CONTINUOUS_INTEGRATION=
+CONTINUOUS_INTEGRATION=""
 
 # IP address of the router (gateway)
 ROUTER_IP_ADDRESS="192.168.1.254"
diff --git a/src/freedombone-image-makefile b/src/freedombone-image-makefile
index f034b8421b8ad93322893aa9d5ccd1be46ed21bb..24e344059364bebb2f72a99e2a16f7c97a2b8e96 100755
--- a/src/freedombone-image-makefile
+++ b/src/freedombone-image-makefile
@@ -41,7 +41,7 @@ IMAGE = $(NAME).img
 ARCHIVE = $(IMAGE).xz
 SIGNATURE = $(ARCHIVE).sig
 OWNER = 1000
-ifeq ("$CONTINUOUS_INTEGRATION", "")
+ifeq ($(CONTINUOUS_INTEGRATION), "")
     XZ = xz --no-warn --verbose --keep --threads=0 -3 $(IMAGE)
     SIGN = -gpg --output $(SIGNATURE) --detach-sig $(ARCHIVE)
 else