diff --git a/src/ca65/expr.c b/src/ca65/expr.c
index ca6f24916..1d066784f 100644
--- a/src/ca65/expr.c
+++ b/src/ca65/expr.c
@@ -404,12 +404,16 @@ static ExprNode* FuncSizeOf (void)
         /* Cheap local symbol */
         Sym = SymFindLocal (SymLast, SVal, SYM_FIND_EXISTING);
         if (Sym == 0) {
-            Error ("Unknown symbol or scope: `%s%s'",
-                   SB_GetConstBuf (&ScopeName), Name);
+            Error ("Unknown symbol or scope: `%s'", SVal);
         } else {
             SizeSym = GetSizeOfSymbol (Sym);
         }
 
+        /* Remember and skip SVal, terminate ScopeName so it is empty */
+        strcpy (Name, SVal);
+        NextTok ();
+        SB_Terminate (&ScopeName);
+
     } else {
 
         /* Parse the scope and the name */