diff --git a/src/grammars.hpp b/src/grammars.hpp
index 39b993d..6d7f11b 100644
--- a/src/grammars.hpp
+++ b/src/grammars.hpp
@@ -346,6 +346,9 @@
     x3::eps;
 
 auto const command_def =
+#if BOOST_VERSION <= 107700
+    x3::eps >>
+#endif
     createCommandSuggestions >> x3::expect[cd | copy | create | delete_rule | set | commit | get | ls | discard | describe | help | move | dump | prepare | exec | cancel | switch_rule];
 
 #if __clang__