diff --git a/3rdParty/rbdl/CMakeLists.txt b/3rdParty/rbdl/CMakeLists.txt
index 04d6fcf2ea0e26f2284fd8d0b6d17055b63cecc0..8d3d24e7e3f923e61511d883086316ca6518974b 100644
--- a/3rdParty/rbdl/CMakeLists.txt
+++ b/3rdParty/rbdl/CMakeLists.txt
@@ -198,7 +198,7 @@ FILE ( GLOB headers
 	${CMAKE_CURRENT_BINARY_DIR}/include/rbdl/rbdl_config.h
 	)
 
-    INSTALL(DIRECTORY ${PROJECT_SOURCE_DIR} DESTINATION ${Simox_INSTALL_HEADER_DIR}
+    INSTALL(DIRECTORY ${PROJECT_SOURCE_DIR}/include/ DESTINATION ${Simox_INSTALL_HEADER_DIR}
           COMPONENT Headers
             FILES_MATCHING
             PATTERN "*.h"