diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 333a6025180..f3e1d211647 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,7 @@
+2016-05-19  Alan Modra  <amodra@gmail.com>
+
+	* ppc-opc.c (NSISIGNOPT): Use insert_nsi and extract_nsi.
+
 2016-05-19  Alan Modra  <amodra@gmail.com>
 
 	* ppc-opc.c: Formatting.
diff --git a/opcodes/ppc-opc.c b/opcodes/ppc-opc.c
index 1c03c88bdab..b44ce0f81d2 100644
--- a/opcodes/ppc-opc.c
+++ b/opcodes/ppc-opc.c
@@ -499,7 +499,7 @@ const struct powerpc_operand powerpc_operands[] =
   /* The NSI field in a D form instruction when we accept a wide range
      of positive values.  */
 #define NSISIGNOPT NSI + 1
-  { 0xffff, 0, NULL, NULL,
+  { 0xffff, 0, insert_nsi, extract_nsi,
     PPC_OPERAND_NEGATIVE | PPC_OPERAND_SIGNED | PPC_OPERAND_SIGNOPT },
 
   /* The RA field in an D, DS, DQ, X, XO, M, or MDS form instruction.  */