Correct documentation in opus_custom.h.
diff --git a/doc/Doxyfile.in b/doc/Doxyfile.in
index b0d15ab..bbe5a43 100644
--- a/doc/Doxyfile.in
+++ b/doc/Doxyfile.in
@@ -613,7 +613,8 @@
 INPUT                  = @top_srcdir@/include/opus.h \
 			 @top_srcdir@/include/opus_types.h   \
                          @top_srcdir@/include/opus_defines.h \
-                         @top_srcdir@/include/opus_multistream.h
+                         @top_srcdir@/include/opus_multistream.h \
+                         @top_srcdir@/include/opus_custom.h
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is
@@ -1454,7 +1455,7 @@
 # undefined via #undef or recursively expanded use the := operator
 # instead of the = operator.
 
-PREDEFINED             = OPUS_EXPORT= OPUS_WARN_UNUSED_RESULT= OPUS_ARG_NONNULL(_x)=
+PREDEFINED             = OPUS_EXPORT= OPUS_CUSTOM_EXPORT= OPUS_CUSTOM_EXPORT_STATIC= OPUS_WARN_UNUSED_RESULT= OPUS_ARG_NONNULL(_x)=
 
 # 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.
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 36065f6..11edd15 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -3,7 +3,8 @@
 DOCINPUTS = $(top_srcdir)/include/opus.h \
             $(top_srcdir)/include/opus_multistream.h \
             $(top_srcdir)/include/opus_defines.h \
-            $(top_srcdir)/include/opus_types.h
+            $(top_srcdir)/include/opus_types.h \
+            $(top_srcdir)/include/opus_custom.h
 
 EXTRA_DIST = Doxyfile.in