--- a/stage3/print_datatypes_error.cc	Thu Mar 15 13:18:02 2012 +0000
+++ b/stage3/print_datatypes_error.cc	Thu Mar 15 13:23:09 2012 +0000
@@ -1047,7 +1047,7 @@
 	    (NULL == symbol->r_exp->datatype) &&
 		(symbol->l_exp->candidate_datatypes.size() > 0)	&&
 		(symbol->r_exp->candidate_datatypes.size() > 0))
-		STAGE3_ERROR(0, symbol, symbol, "Invalid data types for ':=' operation.");
+		STAGE3_ERROR(0, symbol, symbol, "Incompatible data types for ':=' operation.");
 	return NULL;
 }