diff --git a/json/flat.cpp.rl b/json/flat.cpp.rl
index 4884caed..f48b5461 100644
--- a/json/flat.cpp.rl
+++ b/json/flat.cpp.rl
@@ -180,9 +180,7 @@ json::flat::parse (util::view<KLASS>);
 MAP0(INSTANTIATE,
     std::string::iterator,
     std::string::const_iterator,
-    const char* restrict,
     const char*,
-    char *restrict,
     char *
 )
 
diff --git a/json/tree.cpp b/json/tree.cpp
index fe4b8312..d41cccbc 100644
--- a/json/tree.cpp
+++ b/json/tree.cpp
@@ -230,9 +230,7 @@ json::tree::parse (const util::view<KLASS>&);
 MAP0(INSTANTIATE,
     std::string::iterator,
     std::string::const_iterator,
-    const char* restrict,
     const char*,
-    char* restrict,
     char *
 );