diff --git a/compiler/msg/errord.msg b/compiler/msg/errord.msg
index 9bb504551b..a2080e5cd0 100644
--- a/compiler/msg/errord.msg
+++ b/compiler/msg/errord.msg
@@ -2035,7 +2035,7 @@ unit_u_skipping_reresolving_unit=10059_U_Erneutes Resolving der Unit $1 wird 
 #
 # 11039 is the last used one
 #
-option_usage=11000_$1 [Optionen] <Eingabedatei> [Optionen]
+option_usage=11000_O_$1 [Optionen] <Eingabedatei> [Optionen]
 # BeginOfTeX
 %
 % \section{Command-line handling errors}
diff --git a/compiler/msg/errores.msg b/compiler/msg/errores.msg
index 429c3ddfa0..1ff300a97b 100644
--- a/compiler/msg/errores.msg
+++ b/compiler/msg/errores.msg
@@ -2015,7 +2015,7 @@ unit_u_skipping_reresolving_unit=10059_U_Saltando re-resoluci
 #
 # 11039 is the last used one
 #
-option_usage=11000_$1 [opciones] <fichero_entrada> [opciones]
+option_usage=11000_O_$1 [opciones] <fichero_entrada> [opciones]
 # BeginOfTeX
 %
 % \section{Command-line handling errors}