diff --git a/target/microblaze/mmu.c b/target/microblaze/mmu.c
index 1e426963ba..cc40f275ea 100644
--- a/target/microblaze/mmu.c
+++ b/target/microblaze/mmu.c
@@ -74,7 +74,7 @@ static void mmu_change_pid(CPUMBState *env, unsigned int newpid)
 
 /* rw - 0 = read, 1 = write, 2 = fetch.  */
 unsigned int mmu_translate(MicroBlazeCPU *cpu, MicroBlazeMMULookup *lu,
-                           target_ulong vaddr, int rw, int mmu_idx)
+                           target_ulong vaddr, MMUAccessType rw, int mmu_idx)
 {
     MicroBlazeMMU *mmu = &cpu->env.mmu;
     unsigned int i, hit = 0;
diff --git a/target/microblaze/mmu.h b/target/microblaze/mmu.h
index 09e4075739..b6b4b9ad60 100644
--- a/target/microblaze/mmu.h
+++ b/target/microblaze/mmu.h
@@ -84,7 +84,7 @@ typedef struct {
 } MicroBlazeMMULookup;
 
 unsigned int mmu_translate(MicroBlazeCPU *cpu, MicroBlazeMMULookup *lu,
-                           target_ulong vaddr, int rw, int mmu_idx);
+                           target_ulong vaddr, MMUAccessType rw, int mmu_idx);
 uint32_t mmu_read(CPUMBState *env, bool ea, uint32_t rn);
 void mmu_write(CPUMBState *env, bool ea, uint32_t rn, uint32_t v);
 void mmu_init(MicroBlazeMMU *mmu);