diff --git a/src/qt/CMakeLists.txt b/src/qt/CMakeLists.txt
index 4b028b208..e9cce12e0 100644
--- a/src/qt/CMakeLists.txt
+++ b/src/qt/CMakeLists.txt
@@ -181,7 +181,8 @@ foreach(po_file ${po_files})
     get_filename_component(PO_FILE_NAME ${po_file} NAME_WE)
     add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/86box_${PO_FILE_NAME}.qm"
                        COMMAND ${LCONVERT_EXECUTABLE} -i ${po_file} -o ${CMAKE_CURRENT_BINARY_DIR}/86box_${PO_FILE_NAME}.qm
-                       WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")
+                       WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+                       DEPENDS "${po_file}")
     list(APPEND QM_FILES "${CMAKE_CURRENT_BINARY_DIR}/86box_${PO_FILE_NAME}.qm")
     list(APPEND QM_FILES "${po_file}")
 endforeach()