- Updated for migration to size_t

diff --git a/tests/suites/test_suite_base64.function b/tests/suites/test_suite_base64.function
index 9c61ef8..2cc0386 100644
--- a/tests/suites/test_suite_base64.function
+++ b/tests/suites/test_suite_base64.function
@@ -7,7 +7,7 @@
 {
     unsigned char src_str[1000];
     unsigned char dst_str[1000];
-    int len = {dst_buf_size};
+    size_t len = {dst_buf_size};
 
     memset(src_str, 0x00, 1000);
     memset(dst_str, 0x00, 1000);
@@ -26,7 +26,7 @@
 {
     unsigned char src_str[1000];
     unsigned char dst_str[1000];
-    int len = 1000;
+    size_t len = 1000;
     int res; 
 
     memset(src_str, 0x00, 1000);