diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d3fde07a4bd..219d42374f4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2016-04-29  Uros Bizjak  <ubizjak@gmail.com>
+
+	* config/i386/predicates.md (constm1_operand): Fix comparison.
+
 2016-04-29  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* testsuite/gcc.target/arc/ieee_eq.c: New test.
diff --git a/gcc/config/i386/predicates.md b/gcc/config/i386/predicates.md
index 1980a620c87..d15dae45794 100644
--- a/gcc/config/i386/predicates.md
+++ b/gcc/config/i386/predicates.md
@@ -678,7 +678,7 @@
 ;; Match exactly -1.
 (define_predicate "constm1_operand"
   (and (match_code "const_int")
-       (match_test "op = constm1_rtx")))
+       (match_test "op == constm1_rtx")))
 
 ;; Match exactly eight.
 (define_predicate "const8_operand"