diff --git a/src/panfrost/midgard/midgard_opt_float.c b/src/panfrost/midgard/midgard_opt_float.c
index ab6e57be3f8..43e1cd2ea78 100644
--- a/src/panfrost/midgard/midgard_opt_float.c
+++ b/src/panfrost/midgard/midgard_opt_float.c
@@ -56,6 +56,7 @@ midgard_opt_promote_fmov(compiler_context *ctx, midgard_block *block)
                 if (!ins->has_constants) continue;
                 if (mir_nontrivial_source2_mod_simple(ins)) continue;
                 if (mir_nontrivial_outmod(ins)) continue;
+                if (ins->alu.reg_mode != midgard_reg_mode_32) continue;
 
                 /* We found an imov with a constant. Check the constants */
                 bool ok = true;