diff --git a/CMakeLists.txt b/CMakeLists.txt
index f437ee6e9f5589eab36f29704ab0a2abb15d2a18..cc4b50abfd642c9641329f758295f77fc6fc99f5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -99,7 +99,7 @@ add_project_dependency(Eigen3 REQUIRED PKG_CONFIG_REQUIRES "eigen3 >= 3.0.5")
 set_boost_default_options()
 export_boost_default_options()
 find_package(Boost REQUIRED)
-search_for_boost_python()
+search_for_boost_python(REQUIRED)
 
 # ----------------------------------------------------
 # --- INCLUDE ----------------------------------------