diff --git a/mainwindow.cpp b/mainwindow.cpp
index d6c21a394..4c03d5c3c 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,4 +1,4 @@
-//--------------------------------------------------------- MainWindow
+//-------------------------------------------------------- MainWindow
 
 #include "mainwindow.h"
 
diff --git a/wsjtx.pro b/wsjtx.pro
index b85c56b6f..76e59855f 100644
--- a/wsjtx.pro
+++ b/wsjtx.pro
@@ -10,13 +10,19 @@ CONFIG   += thread
 #CONFIG   += console
 
 TARGET = wsjtx
-DESTDIR = ../wsjtx_install
 VERSION = 1.4
 TEMPLATE = app
 DEFINES = QT5
-HAMLIB_DIR = ../../hamlib3/mingw32
 QMAKE_CXXFLAGS += -std=c++11
 
+isEmpty (DESTDIR) {
+DESTDIR = ../wsjtx_install
+}
+
+isEmpty (HAMLIB_DIR) {
+HAMLIB_DIR = ../../hamlib3/mingw32
+}
+
 F90 = gfortran
 gfortran.output = ${QMAKE_FILE_BASE}.o
 gfortran.commands = $$F90 -c -O2 -o ${QMAKE_FILE_OUT} ${QMAKE_FILE_NAME}
@@ -119,7 +125,7 @@ LIBS += -lfftw3f $$system($$F90 -print-file-name=libgfortran.so)
 
 win32 {
 INCLUDEPATH += $${HAMLIB_DIR}/include
-LIBS += -L${HAMLIB_DIR}/lib -lhamlib
+LIBS += -L$${HAMLIB_DIR}/lib -lhamlib
 LIBS += -L./lib -lastro -ljt9
 LIBS += -L. -lfftw3f_win
 LIBS += -lws2_32