diff --git a/elenasrc3/elc/cliconst.h b/elenasrc3/elc/cliconst.h
index f555f10d9..d7657f67d 100644
--- a/elenasrc3/elc/cliconst.h
+++ b/elenasrc3/elc/cliconst.h
@@ -13,7 +13,7 @@
 
 namespace elena_lang
 {
-   #define ELC_REVISION_NUMBER               0x020A
+   #define ELC_REVISION_NUMBER               0x020B
 
 #if defined _M_IX86 || _M_X64
 
diff --git a/elenasrc3/elc/compiler.cpp b/elenasrc3/elc/compiler.cpp
index c803f1993..4a21a91e0 100644
--- a/elenasrc3/elc/compiler.cpp
+++ b/elenasrc3/elc/compiler.cpp
@@ -6882,8 +6882,9 @@ ref_t Compiler :: mapExtension(BuildTreeWriter& writer, Scope& scope, mssg_t& me
       }
 
       if (resolvedMessage) {
-         if (counter > 1 && implicitSignatureRef == 0) {
+         if (counter > 1 && (implicitSignatureRef == 0 && getArgCount(message) > 1)) {
             // HOTFIX : does not resolve an ambigous extension for a weak message
+            // excluding messages without arguments
          }
          else {
             // if we are lucky - use the resolved one
diff --git a/tests60/sandbox/sandbox.l b/tests60/sandbox/sandbox.l
index 6975c1d09..c11252a56 100644
--- a/tests60/sandbox/sandbox.l
+++ b/tests60/sandbox/sandbox.l
@@ -1,15 +1,22 @@
-import system'calendar;
-import extensions;
-
-const int MAX = 50000000;
+//import system'calendar;
+//import extensions;
+//
+//const int MAX = 50000000;
+//
+//public program()
+//{
+//    real pi := 0.0;
+//    for(int i := 0, i < MAX, i += 1)
+//    {
+//        pi += -1.0.power(i) / (i*2+1) * 4
+//    };
+//
+//    console.printLine(pi);
+//}
 
 public program()
 {
-    real pi := 0.0;
-    for(int i := 0, i < MAX, i += 1)
-    {
-        pi += -1.0.power(i) / (i*2+1) * 4
-    };
+   int n := 3;
 
-    console.printLine(pi);
-}
+   bool b := n.isOdd();
+}
\ No newline at end of file