diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5e94d2264aaa2a487e0843f5def565ada60c9f08..967d5a0d955214218b0461531ca3b0860bfd34ee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -196,7 +196,12 @@ else()
     message(STATUS "\t\tMAVLINK\tNO")
 endif ()
 
-if (${OSG_LIBRARY} STREQUAL "OSG_LIBRARY-NOTFOUND")
+# fix for osg found bug
+if (NOT ${OSG_LIBRARY} STREQUAL "OSG_LIBRARY-NOTFOUND")
+	set(OPENSCENEGRAPH_FOUND FALSE)
+endif()
+
+if (OPENSCENEGRAPH_FOUND)
     message(STATUS "\t\tOpenSceneGraph\tNO")
 else()
     message(STATUS "\t\tOpenSceneGraph\tYES")