diff --git a/src/modules/Odbc/precompiled_odbc.h b/src/modules/Odbc/precompiled_odbc.h
index 82540e6ceab60e264cac6edbc59137c4a40561dc..29dde2c71c7052fdd8973543d5b7a4d737f6ddea 100644
--- a/src/modules/Odbc/precompiled_odbc.h
+++ b/src/modules/Odbc/precompiled_odbc.h
@@ -166,7 +166,7 @@ struct precompiled_odbc_result {
 /*
  * Prototypes
  */
-void push_sqlwchar(SQLWCHAR *str, size_t num_bytes);
+void push_sqlwchar(SQLWCHAR *str, size_t len);
 void odbc_error(const char *fun, const char *msg,
 		struct precompiled_odbc *odbc, SQLHSTMT hstmt,
 		RETCODE code, void (*clean)(void *), void *clean_arg);