diff --git a/qemu/target-arm/cpu.h b/qemu/target-arm/cpu.h
index d0d67b1e..5d6c23c7 100644
--- a/qemu/target-arm/cpu.h
+++ b/qemu/target-arm/cpu.h
@@ -512,7 +512,7 @@ typedef struct CPUARMState {
 
 ARMCPU *cpu_arm_init(struct uc_struct *uc, const char *cpu_model);
 int cpu_arm_exec(struct uc_struct *uc, CPUState *cpu);
-uint32_t do_arm_semihosting(CPUARMState *env);
+target_ulong do_arm_semihosting(CPUARMState *env);
 void aarch64_sync_32_to_64(CPUARMState *env);
 void aarch64_sync_64_to_32(CPUARMState *env);