diff --git a/src/compiler/nir/nir_linking_helpers.c b/src/compiler/nir/nir_linking_helpers.c
index 6a574ec29be..187098cafe9 100644
--- a/src/compiler/nir/nir_linking_helpers.c
+++ b/src/compiler/nir/nir_linking_helpers.c
@@ -1391,8 +1391,10 @@ nir_link_opt_varyings(nir_shader *producer, nir_shader *consumer)
             /* The varying is loaded from same uniform, so no need to do any
              * interpolation. Mark it as flat explicitly.
              */
-            if (in_var && in_var->data.interpolation <= INTERP_MODE_NOPERSPECTIVE)
+            if (in_var && in_var->data.interpolation <= INTERP_MODE_NOPERSPECTIVE) {
                in_var->data.interpolation = INTERP_MODE_FLAT;
+               out_var->data.interpolation = INTERP_MODE_FLAT;
+            }
          }
       }