diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.cpp b/src/gallium/drivers/radeonsi/si_state_shaders.cpp
index 16012344abd..82a3e124391 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.cpp
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.cpp
@@ -33,6 +33,7 @@
 #include "util/hash_table.h"
 #include "util/mesa-sha1.h"
 #include "util/u_async_debug.h"
+#include "util/u_math.h"
 #include "util/u_memory.h"
 #include "util/u_prim.h"
 #include "tgsi/tgsi_from_mesa.h"
@@ -1527,7 +1528,9 @@ static void gfx10_shader_ngg(struct si_screen *sscreen, struct si_shader *shader
       shader->ge_cntl = S_03096C_PRIMS_PER_SUBGRP(shader->ngg.max_gsprims) |
                         S_03096C_VERTS_PER_SUBGRP(shader->ngg.hw_max_esverts) |
                         S_03096C_BREAK_PRIMGRP_AT_EOI(break_wave_at_eoi) |
-                        S_03096C_PRIM_GRP_SIZE_GFX11(252 / MAX2(shader->ngg.prim_amp_factor, 1));
+                        S_03096C_PRIM_GRP_SIZE_GFX11(
+                           CLAMP(252 / MAX2(shader->ngg.prim_amp_factor, 1),
+                                 1, 256));
    } else {
       shader->ge_cntl = S_03096C_PRIM_GRP_SIZE_GFX10(shader->ngg.max_gsprims) |
                         S_03096C_VERT_GRP_SIZE(shader->ngg.hw_max_esverts) |