diff --git a/Dockerfile b/Dockerfile
index a6aac3a..05a23e0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,8 @@ ENV DEVICE_INDEX="" \
     FREQUENCIES="" \
     FEED_ID="" \
     PPM="0"\
-    GAIN="40" \
+    GAIN_TYPE="" \
+    GAIN="" \
     SERIAL="" \
     SOAPYSDR="" \
     SERVER_PORT="5556" \
diff --git a/rootfs/etc/s6-overlay/scripts/01-dumphfdl.sh b/rootfs/etc/s6-overlay/scripts/01-dumphfdl.sh
index c6ce099..f05cce4 100755
--- a/rootfs/etc/s6-overlay/scripts/01-dumphfdl.sh
+++ b/rootfs/etc/s6-overlay/scripts/01-dumphfdl.sh
@@ -16,15 +16,14 @@ if [[ -z "$SOAPYSAMPLERATE" ]]; then
 	exit 1
 fi
 
-# if [[ -z "$GAIN" ]]; then
-# 	"${s6wrap[@]}" echo "GAIN is not set, exiting"
-# 	exit 1
-# fi
-
-# if [[ -z "$GAIN_TYPE" ]]; then
-# 	"${s6wrap[@]}" echo "GAIN_TYPE is not set, exiting"
-# 	exit 1
-# fi
+if [[ -n "$GAIN" ]]; then
+	if [[ -z "$GAIN_TYPE" ]]; then
+		"${s6wrap[@]}" echo "GAIN_TYPE is not set with GAIN being set. Please see documentation. Exiting"
+		exit 1
+	fi
+fi
+
+
 
 if [[ -z "$SOAPYSDRDRIVER" ]]; then
 	"${s6wrap[@]}" echo "SOAPYSDRDRIVER is not set, exiting"