diff --git a/package/glog/glog.mk b/package/glog/glog.mk
index 8a8409487a..aa7cacbdd3 100644
--- a/package/glog/glog.mk
+++ b/package/glog/glog.mk
@@ -14,4 +14,15 @@ ifeq ($(BR2_PACKAGE_GFLAGS),y)
 GLOG_DEPENDENCIES = gflags
 endif
 
+# glog can optionally use atomic __sync built-ins. However, its
+# configure script only checks for the availability of the 4 bytes
+# version, but the code also uses the 1 byte version. While this works
+# on most architectures, it does not on architectures that implement
+# only the 4 bytes version, such as Microblaze. So if the architecture
+# does not implement the 1 byte version, we hint the configure script
+# that atomic built-ins should not be used.
+ifeq ($(BR2_TOOLCHAIN_HAS_SYNC_1),)
+GLOG_CONF_ENV += ac_cv___sync_val_compare_and_swap=no
+endif
+
 $(eval $(autotools-package))