diff --git a/source/Commands/CommandObjectExpression.cpp b/source/Commands/CommandObjectExpression.cpp
index a93d4e6..1110c1f 100644
--- a/source/Commands/CommandObjectExpression.cpp
+++ b/source/Commands/CommandObjectExpression.cpp
@@ -71,7 +71,7 @@
 {
     Error error;
 
-    const char short_option = (char) g_option_table[option_idx].short_option;
+    const int short_option = g_option_table[option_idx].short_option;
 
     switch (short_option)
     {