diff --git a/cmake-modules/FindRT.cmake b/cmake-modules/FindRT.cmake
index 17d5df81d..c397acabd 100644
--- a/cmake-modules/FindRT.cmake
+++ b/cmake-modules/FindRT.cmake
@@ -16,5 +16,5 @@ set(RT_LIBRARIES ${RT_LIBRARY})
 # handle the QUIETLY and REQUIRED arguments and set
 # RT_FOUND to TRUE if all listed variables are TRUE
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(rt DEFAULT_MSG RT_LIBRARY)
+find_package_handle_standard_args(RT DEFAULT_MSG RT_LIBRARY)
 mark_as_advanced(RT_LIBRARY)