diff --git a/include/linux/string.h b/include/linux/string.h
index e5d57dc..403ae98 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -59,6 +59,9 @@
 #ifndef __HAVE_ARCH_STRDUP
 extern char * strdup(const char *);
 #endif
+#ifdef __HAVE_ARCH_STRSWAB
+extern char * strswab(const char *);
+#endif
 
 #ifndef __HAVE_ARCH_MEMSET
 extern void * memset(void *,int,__kernel_size_t);