diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4f64d3b0c..e7a3076ce 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1231,6 +1231,9 @@ elseif( CMAKE_SYSTEM_NAME MATCHES "Darwin" )
          "-framework CoreAudioKit"
    )
 
+   # Use the Aqua theme
+   set( USE_AQUA_THEME 1 )
+
    # Create the config file
    set( HAVE_VISIBILITY 1 )
    configure_file( audacity_config.h.in private/configmac.h )
diff --git a/src/audacity_config.h.in b/src/audacity_config.h.in
index 49d1c3167..29b7a0050 100755
--- a/src/audacity_config.h.in
+++ b/src/audacity_config.h.in
@@ -108,3 +108,5 @@
 /* We're using cygwin */
 #cmakedefine __CYGWIN__ 1
 
+/* Use the Aqua theme on Mac */
+#cmakedefine USE_AQUA_THEME 1