diff --git a/src/encauth/ccm/ccm_process.c b/src/encauth/ccm/ccm_process.c
index 2446f28..8346d22 100644
--- a/src/encauth/ccm/ccm_process.c
+++ b/src/encauth/ccm/ccm_process.c
@@ -24,7 +24,8 @@ int ccm_process(ccm_state *ccm,
                 unsigned char *ct,
                 int direction)
 {
-   unsigned char  y, z, b;
+   unsigned char z, b;
+   unsigned long y;
    int err;
 
    LTC_ARGCHK(ccm != NULL);
@@ -44,9 +45,8 @@ int ccm_process(ccm_state *ccm,
    if (ptlen > 0) {
       LTC_ARGCHK(pt != NULL);
       LTC_ARGCHK(ct != NULL);
-      y = 0;
 
-      for (; y < ptlen; y++) {
+      for (y = 0; y < ptlen; y++) {
          /* increment the ctr? */
          if (ccm->CTRlen == 16) {
             for (z = 15; z > 15-ccm->L; z--) {