diff --git a/libwccl/CMakeLists.txt b/libwccl/CMakeLists.txt
index 3d13e4c98f652304073483e6f166209a351872a4..7c77e0a346869b6b5e5d462582f78d203473939a 100644
--- a/libwccl/CMakeLists.txt
+++ b/libwccl/CMakeLists.txt
@@ -4,7 +4,7 @@ PROJECT(wccl)
 
 include_directories( ${CMAKE_CURRENT_BINARY_DIR}/include/ )
 
-find_package(Corpus2 1.0.11 REQUIRED)
+find_package(Corpus2 1.0.12 REQUIRED)
 set(LIBS ${LIBS} ${Corpus2_LIBRARIES})
 
 find_package(PwrUtils 1.0.1 REQUIRED)
diff --git a/libwccl/ops/functions/tset/getwordclass.h b/libwccl/ops/functions/tset/getwordclass.h
index 522b2d39e806439d2ac37d5c3a96abe3ffefdabd..a350562488346c01914643183dd7da1a92153e88 100644
--- a/libwccl/ops/functions/tset/getwordclass.h
+++ b/libwccl/ops/functions/tset/getwordclass.h
@@ -14,7 +14,7 @@ public:
 	typedef boost::shared_ptr<Function<Position> > PosFunctionPtr;
 
 	GetWordClass(const PosFunctionPtr& pos_expr)
-		: GetSymbols(Corpus2::Tag(Corpus2::filled_mask), pos_expr)
+		: GetSymbols(Corpus2::Tag::all_pos_mask, pos_expr)
 	{
 	}
 
diff --git a/libwccl/parser/grammar.g b/libwccl/parser/grammar.g
index 5eac8ae9d29225382c8f4255d0a44995caf3425c..5d6e6db82796dda93b800cee6efa802d3f04d0ff 100644
--- a/libwccl/parser/grammar.g
+++ b/libwccl/parser/grammar.g
@@ -859,7 +859,7 @@ symset_range
 			p2  = position_operator [scope] 
 		RPAREN {
 			if (tag_class) {
-				ret.reset(new GetSymbolsInRange(Corpus2::Tag(Corpus2::filled_mask), p1, p2));
+				ret.reset(new GetSymbolsInRange(Corpus2::Tag::all_pos_mask, p1, p2));
 			}
 			else {
 		 		ret.reset(new GetSymbolsInRange(tset->get_value(), p1, p2));