diff --git a/src/parser.cpp b/src/parser.cpp
index 952cdc0..e5657db 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -542,7 +542,7 @@ void obelisk::Parser::parseRule(obelisk::Rule& rule)
 
                 if (rightEntity == "")
                 {
-                    throw obelisk::ParserException("missing left entity");
+                    throw obelisk::ParserException("missing right entity");
                 }
 
                 if (verb == "")