diff --git a/Makefile.am b/Makefile.am
index 6aa485f8..b1c28b67 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -40,7 +40,7 @@ AM_CPPFLAGS += -DDATADIR='"$(datadir)"' \
 	-DSYSCONFDIR='"$(sysconfdir)"' \
 	-DRPM_OSTREE_FEATURES='"$(RPM_OSTREE_FEATURES)"' \
 	-DRPM_OSTREE_GITREV='"$(RPM_OSTREE_GITREV)"' \
-	-DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_50 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_50
+	-DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_56 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_56
 # Keep this in sync with the AM_CFLAGS in libostree; see
 # that project for more information about e.g. -fno-strict-aliasing
 AM_CFLAGS += -std=gnu11 -fno-strict-aliasing $(WARN_CFLAGS)