diff --git a/audacity.dox b/audacity.dox
index 37ef5b672..20cf15e72 100644
--- a/audacity.dox
+++ b/audacity.dox
@@ -2062,7 +2062,19 @@ INCLUDE_FILE_PATTERNS  =
 # This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
 PREDEFINED             = AUDACITY_DLL_API \
-                         =
+                         = \
+                         USE_VST=1 \
+                         USE_FFMPEG=1 \
+                         USE_LV2=1 \
+                         USE_NYQUIST=1 \
+                         USE_LADSPA=1 \
+                         USE_VAMP=1 \
+                         USE_AUDIO_UNITS \
+                         USE_MIDI=1 \
+                         USE_LIBVORBIS=1 \
+                         USE_LIBMAD=1 \
+                         USE_LIBFLAC=1 \
+                         USE_SBSMS=1
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
 # tag can be used to specify a list of macro names that should be expanded. The