diff --git a/CEP/DP3/CMakeLists.txt b/CEP/DP3/CMakeLists.txt
index 818e6149230803d667ad73782887950846d6199e..2ef1a8b00ff8dfa6558cf0b7057e32a70aaa5d89 100644
--- a/CEP/DP3/CMakeLists.txt
+++ b/CEP/DP3/CMakeLists.txt
@@ -7,10 +7,9 @@ lofar_add_package(DPPP_AOFlag)
 lofar_add_package(SPW_Combine SPWCombine)
 lofar_add_package(AOFlagger)
 
-# Disable DDECal for LOFAR release 2.21
-#lofar_find_package(Armadillo)
-#if(${ARMADILLO_FOUND})
-#  lofar_add_package(DPPP_DDECal)
-#else()
-#  message(WARNING "Armadillo was not found, NOT building DPPP_DDECal")
-#endif()
+lofar_find_package(Armadillo)
+if(${ARMADILLO_FOUND})
+  lofar_add_package(DPPP_DDECal)
+else()
+  message(WARNING "Armadillo was not found, NOT building DPPP_DDECal")
+endif()