diff --git a/mpi/sysdep.h b/mpi/sysdep.h
deleted file mode 100644
index 87cb7bf19..000000000
--- a/mpi/sysdep.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifdef C_UNDERSCORE
-
-#if __STDC__
-#define C_SYMBOL_NAME(name) _##name
-#else
-#define C_SYMBOL_NAME(name) _/**/name
-#endif
-
-#else /* C_UNDERSCORE */
-
-#define C_SYMBOL_NAME(name) name
-
-#endif /* C_UNDERSCORE */