diff --git a/libelf/src/config.h b/libelf/src/config.h
index 5a6219d9ee..2d3f00f630 100644
--- a/libelf/src/config.h
+++ b/libelf/src/config.h
@@ -53,8 +53,9 @@
 #endif	/* USE_LOCKS */
 
 /* Compiler-specific definitions.  */
-//#define strong_alias(name, aliasname) \
- // extern __typeof (name) aliasname __attribute__ ((alias (#name)));
+/*#define strong_alias(name, aliasname) \
+  extern __typeof (name) aliasname __attribute__ ((alias (#name)));
+*/
 
 #define strong_alias(name, aliasname)
 
diff --git a/libelf/src/system.h b/libelf/src/system.h
index c23ad05db4..ebf34799a1 100644
--- a/libelf/src/system.h
+++ b/libelf/src/system.h
@@ -35,6 +35,7 @@
 #include <sys/param.h>
 #include "portable_endian.h"
 #include <unistd.h>
+#include <string.h>
 
 # define LE32(n)	le32toh (n)
 # define LE64(n)	le64toh (n)