1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/rc4/rc4_enc.c b/src/lib/libcrypto/rc4/rc4_enc.c
index d5f18a3a70..0660ea60a2 100644
--- a/src/lib/libcrypto/rc4/rc4_enc.c
+++ b/src/lib/libcrypto/rc4/rc4_enc.c
@@ -157,7 +157,7 @@ void RC4(RC4_KEY *key, unsigned long len, const unsigned char *indata,
                 if (!is_endian.little)
                         {       /* BIG-ENDIAN CASE */
 # define BESHFT(c)      (((sizeof(RC4_CHUNK)-(c)-1)*8)&(sizeof(RC4_CHUNK)*8-1))
-                        for (;len&-sizeof(RC4_CHUNK);len-=sizeof(RC4_CHUNK))
+                        for (;len&~(sizeof(RC4_CHUNK)-1);len-=sizeof(RC4_CHUNK))
                                 {
                                 ichunk  = *(RC4_CHUNK *)indata;
                                 otp  = RC4_STEP<<BESHFT(0);
@@ -210,7 +210,7 @@ void RC4(RC4_KEY *key, unsigned long len, const unsigned char *indata,
                 else
                         {       /* LITTLE-ENDIAN CASE */
 # define LESHFT(c)      (((c)*8)&(sizeof(RC4_CHUNK)*8-1))
-                        for (;len&-sizeof(RC4_CHUNK);len-=sizeof(RC4_CHUNK))
+                        for (;len&~(sizeof(RC4_CHUNK)-1);len-=sizeof(RC4_CHUNK))
                                 {
                                 ichunk  = *(RC4_CHUNK *)indata;
                                 otp  = RC4_STEP;