diff --git a/executable_semantics/syntax/parser.ypp b/executable_semantics/syntax/parser.ypp
index 16b7c7efce80..e8443b9fede2 100644
--- a/executable_semantics/syntax/parser.ypp
+++ b/executable_semantics/syntax/parser.ypp
@@ -786,20 +786,20 @@ deduced_param_list:
       $$ = std::vector<Nonnull<AstNode*>>();
       $$.push_back($1);
     }
-| generic_binding COMMA deduced_param_list
+| deduced_param_list COMMA generic_binding
     {
-      $$ = $3;
-      $$.push_back($1);
+      $$ = $1;
+      $$.push_back($3);
     }
 | variable_declaration
     {
       $$ = std::vector<Nonnull<AstNode*>>();
       $$.push_back($1);
     }
-| variable_declaration COMMA deduced_param_list
+| deduced_param_list COMMA variable_declaration
     {
-      $$ = $3;
-      $$.push_back($1);
+      $$ = $1;
+      $$.push_back($3);
     }
 ;
 deduced_params: