[subset] Refine the coding style
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6f95acb..295cff8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -704,8 +704,8 @@
     )
   endif ()
   if (HB_BUILD_SUBSET)
-  install(TARGETS harfbuzz-subset
-    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    install(TARGETS harfbuzz-subset
+      ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
   )
   endif ()
   if (HB_BUILD_UTILS)