diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 0ec5d1be1f4..2481c2697e7 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -307,6 +307,12 @@ void st_init_limits(struct pipe_screen *screen,
          pc->LowInt.RangeMax = 30;
          pc->LowInt.Precision = 0;
          pc->MediumInt = pc->HighInt = pc->LowInt;
+
+         if (screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_INT16)) {
+            pc->LowInt.RangeMin = 15;
+            pc->LowInt.RangeMax = 14;
+            pc->MediumInt = pc->LowInt;
+         }
       }
 
       if (screen->get_shader_param(screen, sh, PIPE_SHADER_CAP_FP16)) {