diff --git a/xo-cmake/cmake/xo_macros/xo_cxx.cmake b/xo-cmake/cmake/xo_macros/xo_cxx.cmake
index 9d94e9b7..38d01df3 100644
--- a/xo-cmake/cmake/xo_macros/xo_cxx.cmake
+++ b/xo-cmake/cmake/xo_macros/xo_cxx.cmake
@@ -1709,7 +1709,7 @@ function(xo_add_genfacet)
     )
 
     # Create a target for this generation
-    add_custom_target(${GF_TARGET} DEPENDS ${GF_INPUT})
+    add_custom_target(${GF_TARGET} DEPENDS ${GF_INPUT}.out)
 
     set_property(DIRECTORY APPEND PROPERTY XO_GENFACET_TARGETS ${GF_TARGET})
 endfunction()