diff --git a/src/lib_json/CMakeLists.txt b/src/lib_json/CMakeLists.txt
index dc3d977..3e7d5b6 100644
--- a/src/lib_json/CMakeLists.txt
+++ b/src/lib_json/CMakeLists.txt
@@ -37,7 +37,7 @@ ADD_LIBRARY( jsoncpp_lib ${JSONCPP_LIB_TYPE}
              version.h.in
              )
 SET_TARGET_PROPERTIES( jsoncpp_lib PROPERTIES OUTPUT_NAME jsoncpp )
-SET_TARGET_PROPERTIES( jsoncpp_lib PROPERTIES VERSION ${JSON_CPP_VERSION} SOVERSION ${JSON_CPP_VERSION} )
+SET_TARGET_PROPERTIES( jsoncpp_lib PROPERTIES VERSION ${JSONCPP_VERSION} SOVERSION ${JSONCPP_VERSION} )
 
 # Install instructions for this target
 INSTALL( TARGETS jsoncpp_lib