diff --git a/commitpkg b/commitpkg
index 7d533a0..916bdfc 100755
--- a/commitpkg
+++ b/commitpkg
@@ -132,7 +132,10 @@ for _arch in ${arch[@]}; do
 
 		if [[ $SIGNPKG == 'y' ]]; then
 			echo "Signing package ${pkgfile}..."
-			gpg --detach-sign --use-agent -u "${PACKAGER}" "${pkgfile}" || abort
+			if [[ -n $GPGKEY ]]; then
+				SIGNWITHKEY="-u ${GPGKEY}"
+			fi
+			gpg --detach-sign --use-agent ${SIGNWITHKEY} "${pkgfile}" || abort
 		fi
 
 		sigfile="${pkgfile}.sig"