diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 0352fa5b..46968e0f 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -665,6 +665,7 @@ set(CORE_SOURCES
   ../src/value.cc 
   ../src/calc.cc 
   ../src/grid.cc 
+  ../src/hash.cc 
   ../src/expr.cc 
   ../src/func.cc 
   ../src/stackcheck.cc