diff --git a/gnu/dist/gdb6/gdb/sparc64nbsd-nat.c b/gnu/dist/gdb6/gdb/sparc64nbsd-nat.c
index 1b25c9718244..8ce17c996cbe 100644
--- a/gnu/dist/gdb6/gdb/sparc64nbsd-nat.c
+++ b/gnu/dist/gdb6/gdb/sparc64nbsd-nat.c
@@ -27,6 +27,8 @@
 #include "sparc64-tdep.h"
 #include "sparc-nat.h"
 
+#include "nbsd-nat.h"
+
 /* NetBSD is different from the other OSes that support both SPARC and
    UltraSPARC in that the result of ptrace(2) depends on whether the
    traced process is 32-bit or 64-bit.  */
diff --git a/gnu/dist/gdb6/gdb/sparcnbsd-nat.c b/gnu/dist/gdb6/gdb/sparcnbsd-nat.c
index 66a80ce207cb..470214da9872 100644
--- a/gnu/dist/gdb6/gdb/sparcnbsd-nat.c
+++ b/gnu/dist/gdb6/gdb/sparcnbsd-nat.c
@@ -27,6 +27,8 @@
 #include "sparc-tdep.h"
 #include "sparc-nat.h"
 
+#include "nbsd-nat.h"
+
 /* Support for debugging kernel virtual memory images.  */
 
 #include <sys/types.h>