diff --git a/CI/main_ci.cmake b/CI/main_ci.cmake
index d3bc7cbfc5aea0d6a005276e02f6565183b28d92..dae65e947366b8109ddec0358bcf49802c00c2d5 100644
--- a/CI/main_ci.cmake
+++ b/CI/main_ci.cmake
@@ -11,7 +11,7 @@ set (CMAKE_COMMAND "cmake")
 set (PROJECT_SOURCE_DIR "${OTB_SOURCE_DIR}")
 # number of thread used for compilation
 set (CTEST_BUILD_FLAGS "-j8")
-set (CTEST_BUILD_COMMAND "make")
+set (CTEST_BUILD_COMMAND "make ${CTEST_BUILD_FLAGS}")
 
 set (CTEST_CMAKE_GENERATOR "Unix Makefiles")
 set (CTEST_BUILD_NAME "CI_TEST")