diff --git a/lldb/include/lldb/lldb-types.h b/lldb/include/lldb/lldb-types.h
index d9b42d09f948..91d94553a41b 100644
--- a/lldb/include/lldb/lldb-types.h
+++ b/lldb/include/lldb/lldb-types.h
@@ -131,7 +131,7 @@ namespace lldb {
     
     typedef struct
     {
-        uint32_t        usage_mask;    // Used to mark options that can be used together.  If 1 << n && usage_mask != 0
+        uint32_t        usage_mask;    // Used to mark options that can be used together.  If (1 << n & usage_mask) != 0
                                        // then this option belongs to option set n.
         bool            required;       // This option is required (in the current usage level)
         CONST_CHAR_PTR  long_option;    // Full name for this option.