diff --git a/source/RobotAPI/libraries/skills/provider/CMakeLists.txt b/source/RobotAPI/libraries/skills/provider/CMakeLists.txt
index fba16f3e70fe8849748369529001df24644ffc87..9cb59c319fdf937ee9eb341610071f44114de3c1 100644
--- a/source/RobotAPI/libraries/skills/provider/CMakeLists.txt
+++ b/source/RobotAPI/libraries/skills/provider/CMakeLists.txt
@@ -21,6 +21,8 @@ armarx_add_library(
         LambdaSkill.cpp
         SimpleSkill.cpp
         SimpleSpecializedSkill.cpp
+        SimplePeriodicSpecializedSkill.cpp
+        SimplePeriodicSkill.cpp
         SpecializedSkillProxy.cpp
         PeriodicSkill.cpp
         SpecializedSkill.cpp
@@ -35,6 +37,8 @@ armarx_add_library(
         LambdaSkill.h
         SimpleSkill.h
         SimpleSpecializedSkill.h
+        SimplePeriodicSpecializedSkill.h
+        SimplePeriodicSkill.h
         SpecializedSkillProxy.h
         PeriodicSkill.h
         SpecializedSkill.h