diff --git a/reactos/base/shell/cmd/lang/de-DE.rc b/reactos/base/shell/cmd/lang/de-DE.rc
index 1bbcfa771b1..277772391fe 100644
--- a/reactos/base/shell/cmd/lang/de-DE.rc
+++ b/reactos/base/shell/cmd/lang/de-DE.rc
@@ -643,4 +643,9 @@ STRING_FOR_ERROR,                  "ung
 STRING_SCREEN_COL,                 "ungültige Spalten-Angabe"
 STRING_SCREEN_ROW,                 "ungültige Zeilen-Angabe"
 STRING_TIMER_TIME                  "Timer %d ist %s: "
+
+STRING_INVALID_OPERAND,            "Ungültiger Operand."
+STRING_EXPECTED_CLOSE_PAREN,       "Erwartet ')'."
+STRING_EXPECTED_NUMBER_OR_VARIABLE,"Erwartet Nummer oder Variablennamen."
+STRING_SYNTAX_COMMAND_INCORRECT,   "Syntaxfehler."
 }
diff --git a/reactos/base/shell/cmd/set.c b/reactos/base/shell/cmd/set.c
index 522c340bb0e..0632e8c65f0 100644
--- a/reactos/base/shell/cmd/set.c
+++ b/reactos/base/shell/cmd/set.c
@@ -112,6 +112,13 @@ INT cmd_set (LPTSTR cmd, LPTSTR param)
 		return Success;
 	}
 
+	if ( !_tcsnicmp (param, _T("/"), 1) )
+	{
+		LoadString(CMD_ModuleHandle, STRING_SYNTAX_COMMAND_INCORRECT, szMsg, RC_STRING_MAX_SIZE);
+		ConErrPrintf (szMsg, param);
+		return 0;
+	}
+
 	p = _tcschr (param, _T('='));
 	if (p)
 	{