diff --git a/CMakeLists.txt b/CMakeLists.txt
index 14735c6..b411785 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,7 +30,7 @@ if (UIMGUI_INSTALL)
     install(TARGETS UntitledOpen
             LIBRARY DESTINATION lib/
             ARCHIVE DESTINATION lib/)
-    install(FILES UntitledOpen.h Common.h DESTINATION include/UntitledOpen)
+    install(FILES UntitledOpen.hpp Common.h DESTINATION include/UntitledOpen)
     install(FILES C/CUntitledOpen.h DESTINATION include/UntitledOpen/C)
     install(FILES ${PROJECT_BINARY_DIR}/UntitledOpen.pc
             DESTINATION lib/pkgconfig/)