diff --git a/libobs/util/utf8.c b/libobs/util/utf8.c
index d0b5c349a..0c96de162 100644
--- a/libobs/util/utf8.c
+++ b/libobs/util/utf8.c
@@ -41,7 +41,7 @@ size_t utf8_to_wchar(const char *in, size_t insize, wchar_t *out,
 	if (has_utf8_bom(in)) {
 		if (i_insize >= 3) {
 			in += 3;
-			insize -= 3;
+			i_insize -= 3;
 		}
 	}