diff --git a/sys/oss/Makefile.am b/sys/oss/Makefile.am
index 21d957b5a4..fcaebdb9c4 100644
--- a/sys/oss/Makefile.am
+++ b/sys/oss/Makefile.am
@@ -17,9 +17,10 @@ libgstossaudio_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 libgstosshelper_la_SOURCES = gstosshelper.c
 libgstosshelper_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
 
-noinst_HEADERS = gstosssink.h	 \
-		 gstosssrc.h	 \
-		 gstossgst.h	 \
-		 gstosshelper.h	 \
-		 gstosselement.h \
-		 gstossmixer.c
+noinst_HEADERS = gstosssink.h	\
+		gstosssrc.h	\
+		gstossgst.h	\
+		gstosshelper.h	\
+		gstosselement.h\
+		gstossmixer.c	\
+		gstossmixer.h