diff --git a/include/asm-ia64/mman.h b/include/asm-ia64/mman.h
index df1b20e773bc..b242f952234c 100644
--- a/include/asm-ia64/mman.h
+++ b/include/asm-ia64/mman.h
@@ -9,10 +9,12 @@
  */
 
 #ifdef __KERNEL__
+#ifndef __ASSEMBLY__
 #define arch_mmap_check	ia64_map_check_rgn
 int ia64_map_check_rgn(unsigned long addr, unsigned long len,
 		unsigned long flags);
 #endif
+#endif
 
 #include <asm-generic/mman.h>