diff --git a/target/ppc/internal.h b/target/ppc/internal.h
index 337a362205..901bae6d39 100644
--- a/target/ppc/internal.h
+++ b/target/ppc/internal.h
@@ -242,9 +242,12 @@ static inline int prot_for_access_type(MMUAccessType access_type)
     g_assert_not_reached();
 }
 
+#ifndef CONFIG_USER_ONLY
+
 /* PowerPC MMU emulation */
 
 typedef struct mmu_ctx_t mmu_ctx_t;
+
 bool ppc_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
                       hwaddr *raddrp, int *psizep, int *protp,
                       int mmu_idx, bool guest_visible);
@@ -266,6 +269,8 @@ struct mmu_ctx_t {
     int nx;                        /* Non-execute area          */
 };
 
+#endif /* !CONFIG_USER_ONLY */
+
 /* Common routines used by software and hardware TLBs emulation */
 static inline int pte_is_valid(target_ulong pte0)
 {