diff --git a/src/ls_odbc.c b/src/ls_odbc.c
index 8e38d1a..c637a06 100644
--- a/src/ls_odbc.c
+++ b/src/ls_odbc.c
@@ -11,6 +11,7 @@
 #include <string.h>
 #include <time.h>
 
+#define SQL_NOUNICODEMAP
 #if defined(_WIN32)
 #include <windows.h>
 #include <sqlext.h>