diff --git a/Userland/Libraries/LibJS/CMakeLists.txt b/Userland/Libraries/LibJS/CMakeLists.txt
index 8098e2b9bc8..bcfd5a96f01 100644
--- a/Userland/Libraries/LibJS/CMakeLists.txt
+++ b/Userland/Libraries/LibJS/CMakeLists.txt
@@ -93,3 +93,6 @@ set(SOURCES
 
 serenity_lib(LibJS js)
 target_link_libraries(LibJS LibM LibCore LibCrypto LibRegex LibSyntax)
+
+serenity_add_precompiled_header_to_target(LibJS ${CMAKE_CURRENT_SOURCE_DIR}/Heap/Heap.h)
+serenity_add_precompiled_header_to_target(LibJS ${CMAKE_CURRENT_SOURCE_DIR}/Runtime/GlobalObject.h)