diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h
index 3d6fbb00d20b..c4cf01197273 100644
--- a/arch/powerpc/include/asm/mmu-hash64.h
+++ b/arch/powerpc/include/asm/mmu-hash64.h
@@ -351,6 +351,7 @@ static inline int __hash_page_thp(unsigned long ea, unsigned long access,
 				  int ssize, unsigned int psize)
 {
 	BUG();
+	return -1;
 }
 #endif
 extern void hash_failure_debug(unsigned long ea, unsigned long access,