diff --git a/src/nodedef.cpp b/src/nodedef.cpp
index e9abc323b..f1946830f 100644
--- a/src/nodedef.cpp
+++ b/src/nodedef.cpp
@@ -109,6 +109,8 @@ void ContentFeatures::reset()
 	*/
 	name = "";
 	groups.clear();
+	// Unknown nodes can be dug
+	groups["dig_immediate"] = 2;
 	drawtype = NDT_NORMAL;
 	visual_scale = 1.0;
 	for(u32 i=0; i<6; i++)