diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index bfbd341..d8c8545 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -353,6 +353,9 @@
 		ret = -EINVAL;
 	oh->_clk = c;
 
+	WARN(!c->clkdm, "omap_hwmod: %s: missing clockdomain for %s.\n",
+	     oh->clkdev_con_id, c->name);
+
 	return ret;
 }