diff --git a/CMakeLists.txt b/CMakeLists.txt
index e4ecf0903..4ef5b3d3e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -255,7 +255,7 @@ if (WITH_BZIP)
   find_package(BZip2)
   if (BZIP2_FOUND)
     add_definitions (-DBZIP_SUPPORT)
-    set (EXTRA_INCDIR ${EXTRA_LIB} ${BZIP2_INCLUDE_DIR})
+    set (EXTRA_INCDIR ${BZIP2_INCLUDE_DIR})
     set (EXTRA_LIB ${EXTRA_LIB} ${BZIP2_LIBRARIES})
   endif (BZIP2_FOUND)
 endif (WITH_BZIP)