diff --git a/src/device/device_util.c b/src/device/device_util.c
index 80f82fd03d..809748465f 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -586,6 +586,10 @@ void search_global_resources(unsigned long type_mask, unsigned long type,
 			if (res->flags & IORESOURCE_SUBTRACTIVE)
 				continue;
 
+			/* If the resource is not assigned ignore it. */
+			if (!(res->flags & IORESOURCE_ASSIGNED))
+				continue;
+
 			search(gp, curdev, res);
 		}
 	}