diff --git a/simgear/emesary/CMakeLists.txt b/simgear/emesary/CMakeLists.txt
index 13ad790d..30ca3318 100644
--- a/simgear/emesary/CMakeLists.txt
+++ b/simgear/emesary/CMakeLists.txt
@@ -13,7 +13,7 @@ set(HEADERS
     )
     
 set(SOURCES 
-    emesary.cxx
+    Emesary.cxx
     )
 
 simgear_component(emesary emesary "${SOURCES}" "${HEADERS}")