diff --git a/src/regex_impl.cc b/src/regex_impl.cc
index 9ede5989..3e6cd832 100644
--- a/src/regex_impl.cc
+++ b/src/regex_impl.cc
@@ -30,8 +30,8 @@ struct ParsedRegex
         SubjectEnd,
         ResetStart,
         LookAhead,
-        LookBehind,
         NegativeLookAhead,
+        LookBehind,
         NegativeLookBehind,
     };
 
@@ -572,14 +572,14 @@ private:
                 push_op(CompiledRegex::LookAhead);
                 push_string(node->children);
                 break;
-            case ParsedRegex::LookBehind:
-                push_op(CompiledRegex::LookBehind);
-                push_string(node->children, true);
-                break;
             case ParsedRegex::NegativeLookAhead:
                 push_op(CompiledRegex::NegativeLookAhead);
                 push_string(node->children);
                 break;
+            case ParsedRegex::LookBehind:
+                push_op(CompiledRegex::LookBehind);
+                push_string(node->children, true);
+                break;
             case ParsedRegex::NegativeLookBehind:
                 push_op(CompiledRegex::NegativeLookBehind);
                 push_string(node->children, true);
diff --git a/src/regex_impl.hh b/src/regex_impl.hh
index f6f79baf..0c15b57a 100644
--- a/src/regex_impl.hh
+++ b/src/regex_impl.hh
@@ -30,8 +30,8 @@ struct CompiledRegex
         SubjectBegin,
         SubjectEnd,
         LookAhead,
-        LookBehind,
         NegativeLookAhead,
+        LookBehind,
         NegativeLookBehind,
     };