diff --git a/CMake/External_OTB.cmake b/CMake/External_OTB.cmake
index 7384aa91d258ad1013365a11675c0e0feccac0bb..73bfed46d2b30e8f585afc64e6f0e8044a36e15e 100644
--- a/CMake/External_OTB.cmake
+++ b/CMake/External_OTB.cmake
@@ -50,10 +50,11 @@ endif()
 if(USE_SYSTEM_OSSIM)
   set(OTB_SB_OSSIM_CONFIG)
 else()
-  set(OTB_SB_OSSIM_CONFIG
-    -DOSSIM_INCLUDE_DIR:PATH=${CMAKE_INSTALL_PREFIX}/include
-    -DOSSIM_LIBRARY:PATH=${CMAKE_INSTALL_PREFIX}/lib/libossim${CMAKE_SHARED_LIBRARY_SUFFIX}
-    )
+  #try OTB can find automatically from CMAKE_PREFIX_PATH
+  set(OTB_SB_OSSIM_CONFIG)  
+    #-DOSSIM_INCLUDE_DIR:PATH=${CMAKE_INSTALL_PREFIX}/include
+    #-DOSSIM_LIBRARY:PATH=${CMAKE_INSTALL_PREFIX}/lib/libossim${CMAKE_SHARED_LIBRARY_SUFFIX}
+    #)
   list(APPEND ${proj}_DEPENDENCIES OSSIM)
 endif()