diff --git a/configure.ac b/configure.ac
index 65be04d..d1d21f0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,7 +38,7 @@ AC_CHECK_DECLS([program_invocation_short_name], [], [], [[
 
 dnl Checks for library functions.
 VL_LIB_READLINE
-AC_CHECK_FUNCS(strptime fmemopen gmtime_r reallocf wcstombs_l vasprintf vasnprintf)
+AC_CHECK_FUNCS(strptime fmemopen gmtime_r reallocf wcstombs_l mbstowcs_l vasprintf vasnprintf)
 
 AM_GCC_ATTRIBUTE_ALIAS
 
diff --git a/src/odbc/odbcw.c b/src/odbc/odbcw.c
index ffd5902..899dbd9 100644
--- a/src/odbc/odbcw.c
+++ b/src/odbc/odbcw.c
@@ -66,7 +66,7 @@ static size_t ascii2unicode(struct _hdbc* dbc, const char *_in, size_t _in_len,
     size_t count = 0, i;
 #if defined(_WIN32) || defined(WIN32) || defined(_WIN64) || defined(WIN64) || defined(WINDOWS)
     count = _mbstowcs_l(w, _in, _out_count, dbc->locale);
-#elif defined(HAVE_WCSTOMBS_L)
+#elif defined(HAVE_MBSTOWCS_L)
     count = mbstowcs_l(w, _in, _out_count, dbc->locale);
 #else
     locale_t oldlocale = uselocale(dbc->locale);