diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 0a763f425..89ac9b47e 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -56,7 +56,7 @@
 #include "mbedtls/oid.h"
 #endif
 
-#define PROPER_HS_FRAGMENT 0x75555555
+#define PROPER_HS_FRAGMENT 0x75
 
 #if defined(MBEDTLS_SSL_TRANSFORM_OPTIMIZE_CIPHERS)
 static int mbedtls_ssl_switch_key( mbedtls_ssl_transform *transform,