diff --git a/Makefile.am b/Makefile.am
index a485cc75..e25842d9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,6 +24,7 @@ AM_CPPFLAGS += -DDATADIR='"$(datadir)"' -DLIBEXECDIR='"$(libexecdir)"' \
 	-DLOCALEDIR=\"$(datadir)/locale\" -DSYSCONFDIR=\"$(sysconfdir)\" \
 	-DSHORTENED_SYSCONFDIR=\"$(shortened_sysconfdir)\" \
 	-DOSTREE_FEATURES='"$(OSTREE_FEATURES)"' \
+	-DG_LOG_DOMAIN=\"OSTree\" \
 	-DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_40 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_40 \
 	-DSOUP_VERSION_MIN_REQUIRED=SOUP_VERSION_2_40 -DSOUP_VERSION_MAX_ALLOWED=SOUP_VERSION_2_48
 AM_CFLAGS += $(WARN_CFLAGS)