diff --git a/src/s/sol2-3.h b/src/s/sol2-3.h
index ac80a2ff120..2e5d068d193 100644
--- a/src/s/sol2-3.h
+++ b/src/s/sol2-3.h
@@ -48,12 +48,3 @@
     strncpy(pty_name, ptyname, sizeof(pty_name)); \
     pty_name[sizeof(pty_name) - 1] = 0;		\
   }
-
-/* David Miller <davem@caip.rutgers.edu> says vfork fails on 2.4.
-   Brendan Kehoe <brendan@zen.org> says it also fails on 2.3.
-   So we'll use the alternate definition in sysdep.c.
-   But a header file has a declaration
-   that would conflict with the definition of vfork in sysdep.c.
-   So we'll choose the return type to match the system header.  */
-#undef HAVE_VFORK
-#define VFORK_RETURN_TYPE pid_t