diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1b4b13aba96..c81c611e9a8 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2017-12-23  Simon Marchi  <simon.marchi@polymtl.ca>
+
+	* target-descriptions.c (print_c_tdesc)
+	<printf_field_type_assignment>: Add ATTRIBUTE_PRINTF.
+
 2017-12-21  Simon Marchi  <simon.marchi@ericsson.com>
 	    Sergio Durigan Junior  <sergiodj@redhat.com>
 
diff --git a/gdb/target-descriptions.c b/gdb/target-descriptions.c
index 5dcc4c4c5c0..b37f4f0c193 100644
--- a/gdb/target-descriptions.c
+++ b/gdb/target-descriptions.c
@@ -2011,6 +2011,7 @@ class print_c_tdesc : public tdesc_element_visitor
 
   /* Print an assignment to the field_type variable.  Print the declaration
      of field_type if that has not been done yet.  */
+  ATTRIBUTE_PRINTF (2, 3)
   void printf_field_type_assignment (const char *fmt, ...)
   {
     if (!m_printed_field_type)