diff --git a/src/asahi/compiler/agx_compiler.h b/src/asahi/compiler/agx_compiler.h
index dcce8e6a977..4251a4c724a 100644
--- a/src/asahi/compiler/agx_compiler.h
+++ b/src/asahi/compiler/agx_compiler.h
@@ -772,8 +772,8 @@ agx_validate(UNUSED agx_context *ctx, UNUSED const char *after_str)
 }
 #endif
 
-unsigned agx_read_registers(agx_instr *I, unsigned s);
-unsigned agx_write_registers(agx_instr *I, unsigned d);
+unsigned agx_read_registers(const agx_instr *I, unsigned s);
+unsigned agx_write_registers(const agx_instr *I, unsigned d);
 bool agx_allows_16bit_immediate(agx_instr *I);
 
 struct agx_copy {
diff --git a/src/asahi/compiler/agx_register_allocate.c b/src/asahi/compiler/agx_register_allocate.c
index 27da7da92c9..4fd263ef783 100644
--- a/src/asahi/compiler/agx_register_allocate.c
+++ b/src/asahi/compiler/agx_register_allocate.c
@@ -25,7 +25,7 @@ struct ra_ctx {
 
 /** Returns number of registers written by an instruction */
 unsigned
-agx_write_registers(agx_instr *I, unsigned d)
+agx_write_registers(const agx_instr *I, unsigned d)
 {
    unsigned size = agx_size_align_16(I->dest[d].size);
 
@@ -72,7 +72,7 @@ agx_split_width(const agx_instr *I)
 }
 
 unsigned
-agx_read_registers(agx_instr *I, unsigned s)
+agx_read_registers(const agx_instr *I, unsigned s)
 {
    unsigned size = agx_size_align_16(I->src[s].size);