--- src/Makefile.am.orig	2015-03-02 23:54:36.000000000 +0100
+++ src/Makefile.am	2017-12-18 17:23:45.222731000 +0100
@@ -5,11 +5,15 @@ LIBS = @GTK_LIBS@ @ALSA_LIBS@ @X11_LIBS@
 
 bin_PROGRAMS = volumeicon
 
-if ENABLE_OSS
+if ENABLE_OSS4
 BACKEND = oss_backend.c oss_backend.h
 else
+if ENABLE_OSS3
+BACKEND = oss3_backend.c oss_backend.h
+else
 BACKEND = alsa_backend.c alsa_backend.h alsa_volume_mapping.h alsa_volume_mapping.c
 endif
+endif
 
 volumeicon_SOURCES = \
 	volumeicon.c \