diff --git a/Modules/sha256module.c b/Modules/sha256module.c
index 3274e7c..767bfac 100644
--- a/Modules/sha256module.c
+++ b/Modules/sha256module.c
@@ -274,7 +274,7 @@
         memcpy(((SHA_BYTE *) sha_info->data) + sha_info->local, buffer, i);
         count -= i;
         buffer += i;
-        sha_info->local += i;
+        sha_info->local += (int)i;
         if (sha_info->local == SHA_BLOCKSIZE) {
             sha_transform(sha_info);
         }
@@ -289,7 +289,7 @@
         sha_transform(sha_info);
     }
     memcpy(sha_info->data, buffer, count);
-    sha_info->local = count;
+    sha_info->local = (int)count;
 }
 
 /* finish computing the SHA digest */
diff --git a/Modules/sha512module.c b/Modules/sha512module.c
index 3e0f6ce..66c2c49 100644
--- a/Modules/sha512module.c
+++ b/Modules/sha512module.c
@@ -300,7 +300,7 @@
         memcpy(((SHA_BYTE *) sha_info->data) + sha_info->local, buffer, i);
         count -= i;
         buffer += i;
-        sha_info->local += i;
+        sha_info->local += (int)i;
         if (sha_info->local == SHA_BLOCKSIZE) {
             sha512_transform(sha_info);
         }
@@ -315,7 +315,7 @@
         sha512_transform(sha_info);
     }
     memcpy(sha_info->data, buffer, count);
-    sha_info->local = count;
+    sha_info->local = (int)count;
 }
 
 /* finish computing the SHA digest */