diff --git a/src_main/core/pichar.cpp b/src_main/core/pichar.cpp
index e754d0a8..a72b0cd3 100644
--- a/src_main/core/pichar.cpp
+++ b/src_main/core/pichar.cpp
@@ -79,7 +79,7 @@ ushort charFromCodepage(const char * c, int size, const char * codepage, int * t
 #endif
 	wchar_t wc(0);
 	mbtowc(0, 0, 0); // reset mbtowc
-	ret = mbtowc(&wc, c, sizeof(ushort));
+	ret = mbtowc(&wc, c, size);
 	if (ret < 1 || ret > (int)sizeof(ushort)) return 0;
 	else return wc;
 	return c[0];