diff --git a/src/asahi/compiler/agx_compile.c b/src/asahi/compiler/agx_compile.c
index 69f3d01901c..251cf0cd675 100644
--- a/src/asahi/compiler/agx_compile.c
+++ b/src/asahi/compiler/agx_compile.c
@@ -740,6 +740,8 @@ agx_emit_load(agx_builder *b, agx_index dest, nir_intrinsic_instr *instr)
    enum agx_format fmt = agx_format_for_pipe(nir_intrinsic_format(instr));
    unsigned shift = nir_intrinsic_base(instr);
 
+   assert(shift <= 3);
+
    /* Zero-extend offset if we're not sign-extending */
    if (!nir_intrinsic_sign_extend(instr))
       offset = agx_abs(offset);
@@ -758,6 +760,8 @@ agx_emit_store(agx_builder *b, nir_intrinsic_instr *instr)
    enum agx_format fmt = agx_format_for_pipe(nir_intrinsic_format(instr));
    unsigned shift = nir_intrinsic_base(instr);
 
+   assert(shift <= 3);
+
    /* Zero-extend offset if we're not sign-extending */
    if (!nir_intrinsic_sign_extend(instr))
       offset = agx_abs(offset);