diff --git a/ZRColaCompile/dbsource.cpp b/ZRColaCompile/dbsource.cpp
index bd95de5..e47244e 100644
--- a/ZRColaCompile/dbsource.cpp
+++ b/ZRColaCompile/dbsource.cpp
@@ -251,7 +251,7 @@ bool ZRCola::DBSource::GetValue(const ATL::CComPtr<ADOField>& f, wstring& val) c
         val.reserve(::SysStringLen(V_BSTR(&v)));
         val = V_BSTR(&v);
     } else
-        val.empty();
+        val.clear();
 
     return true;
 }
diff --git a/output/data/ZRCola.zrcdb b/output/data/ZRCola.zrcdb
index c4e500d..538d2a7 100644
Binary files a/output/data/ZRCola.zrcdb and b/output/data/ZRCola.zrcdb differ