1 files changed, 1 insertions, 1 deletions
diff --git a/src/mac/cmac/cmac.cpp b/src/mac/cmac/cmac.cpp
index adc08852c..7cd53f578 100644
--- a/src/mac/cmac/cmac.cpp
+++ b/src/mac/cmac/cmac.cpp
@@ -52,7 +52,7 @@ void CMAC::add_data(const byte input[], size_t length)
          input += output_length();
          length -= output_length();
          }
-      buffer.copy(input, length);
+      copy_mem(&buffer[0], input, length);
       position = 0;
       }
    position += length;