diff --git a/bamboo/flags.cmake b/bamboo/flags.cmake
index 37ae618b6..a6e3c1324 100644
--- a/bamboo/flags.cmake
+++ b/bamboo/flags.cmake
@@ -1 +1,2 @@
-SET(ENABLE_EXTRA_TESTS ON CACHE BOOL "Enable extra tests")
+SET(ENABLE_EXTRA_TESTS     ON CACHE BOOL "Enable extra tests")
+SET(ENABLE_ECCODES_THREADS ON CACHE BOOL "Enable POSIX threads")