diff --git a/Ladybird/cmake/ResourceFiles.cmake b/Ladybird/cmake/ResourceFiles.cmake
index 2c8a8951553..cfaf3aa17db 100644
--- a/Ladybird/cmake/ResourceFiles.cmake
+++ b/Ladybird/cmake/ResourceFiles.cmake
@@ -106,6 +106,7 @@ function(copy_resource_set subdir)
 
         add_custom_command(
             OUTPUT ${outputs}
+            DEPENDS ${inputs}
             COMMAND "${CMAKE_COMMAND}" -E make_directory "${COPY_DESTINATION}/${subdir}"
             COMMAND "${CMAKE_COMMAND}" -E copy_if_different "${inputs}" "${COPY_DESTINATION}/${subdir}"
             COMMAND_EXPAND_LISTS