diff --git a/src/plugins/arts/Makefile.am b/src/plugins/arts/Makefile.am
index f1bc86a88bb4ca2da4fbc71443963bd527dc1e68..42a775769576c83d82cf3ba8b6670becfc1adf6a 100644
--- a/src/plugins/arts/Makefile.am
+++ b/src/plugins/arts/Makefile.am
@@ -16,13 +16,12 @@ artssources =
 
 endif
 
-INCLUDES = -I$(top_srcdir) -I$(top_srcdir)/include
+INCLUDES = -I$(top_srcdir) -I$(top_srcdir)/include @ARTS_CFLAGS@
 
 libdir = $(plugindir)
 lib_LTLIBRARIES = $(artsltlibs)
 
 libarts_la_LDFLAGS = $(artsldflags)
-CFLAGS = @ARTS_CFLAGS@
 libarts_la_LIBADD = @ARTS_LIBS@
 libarts_la_SOURCES = $(artssources)