diff --git a/docs/users_guide/runtime_control.rst b/docs/users_guide/runtime_control.rst
index b3ab08f20fa904ddcf3a66514f6459e71b43611a..5f64409b5a8730ff299ef6209737e5d71f2f8671 100644
--- a/docs/users_guide/runtime_control.rst
+++ b/docs/users_guide/runtime_control.rst
@@ -643,7 +643,7 @@ performance.
     ``-F`` parameter will be reduced in order to avoid exceeding the
     maximum heap size.
 
-.. rts-flag:: -Mgrace= ⟨size⟩
+.. rts-flag:: -Mgrace=⟨size⟩
 
     :default: 1M