diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 6885af0cf2..1d305059a5 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2019-03-26  Alan Hayward  <alan.hayward@arm.com>
+
+        * arm-linux-nat.c: Add include.
+
 2019-03-25  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* source-cache.c (source_cache::get_source_lines): Re-read
diff --git a/gdb/arm-linux-nat.c b/gdb/arm-linux-nat.c
index b54bd5afe9..52668da9fc 100644
--- a/gdb/arm-linux-nat.c
+++ b/gdb/arm-linux-nat.c
@@ -38,6 +38,7 @@
 #include <sys/procfs.h>
 
 #include "nat/linux-ptrace.h"
+#include "linux-tdep.h"
 
 /* Prototypes for supply_gregset etc.  */
 #include "gregset.h"