diff --git a/src/stdlib/SDL_iconv.c b/src/stdlib/SDL_iconv.c
index de86c20d2..9e6889141 100644
--- a/src/stdlib/SDL_iconv.c
+++ b/src/stdlib/SDL_iconv.c
@@ -383,7 +383,7 @@ size_t SDL_iconv(SDL_iconv_t cd,
 						*/
 						ch = UNKNOWN_UNICODE;
 					} else {
-						if ( (p[0] & 0xCE) == 0xC0 ) {
+						if ( (p[0] & 0xDE) == 0xC0 ) {
 							overlong = SDL_TRUE;
 						}
 						ch = (Uint32)(p[0] & 0x1F);