diff --git a/qtinterface/uic-tqt.cmake b/qtinterface/uic-tqt.cmake
index 51b6626..bcf2c58 100755
--- a/qtinterface/uic-tqt.cmake
+++ b/qtinterface/uic-tqt.cmake
@@ -10,9 +10,13 @@ else
 		fi
 	done
 
-	cp -Rp $uifile $uifile.bkp
-	tqt-replace $uifile
+	if [[ "$uifile" != "" ]]; then
+		cp -Rp $uifile $uifile.bkp
+		tqt-replace $uifile
+	fi
 	@UIC_EXECUTABLE@ "$@"
-	cp -Rp $uifile.bkp $uifile
-	rm -f $uifile.bkp
+	if [[ "$uifile" != "" ]]; then
+		cp -Rp $uifile.bkp $uifile
+		rm -f $uifile.bkp
+	fi
 fi