diff --git a/gnu/dist/gdb/gdb/shnbsd-nat.c b/gnu/dist/gdb/gdb/shnbsd-nat.c
index e1b56e664051..c7ad38fd8583 100644
--- a/gnu/dist/gdb/gdb/shnbsd-nat.c
+++ b/gnu/dist/gdb/gdb/shnbsd-nat.c
@@ -26,6 +26,7 @@
 #include "defs.h"
 #include "inferior.h"
 
+#include "sh-tdep.h"
 #include "shnbsd-tdep.h"
 
 /* Determine if PT_GETREGS fetches this register. */