diff --git a/sdk/core/azure-core/CHANGELOG.md b/sdk/core/azure-core/CHANGELOG.md
index 082573d40..e42a84ac6 100644
--- a/sdk/core/azure-core/CHANGELOG.md
+++ b/sdk/core/azure-core/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## 1.1.0-beta.1 (Unreleased)
 
+### Bug Fixes
+
+- Fixed a memory leak issue in `Base64Encode()`.
 
 ## 1.0.0 (2021-06-04)
 
diff --git a/sdk/core/azure-core/src/base64.cpp b/sdk/core/azure-core/src/base64.cpp
index 823325ced..83924baea 100644
--- a/sdk/core/azure-core/src/base64.cpp
+++ b/sdk/core/azure-core/src/base64.cpp
@@ -68,7 +68,6 @@ namespace Azure { namespace Core {
     BUF_MEM* bufferPtr;
     BIO_get_mem_ptr(bio, &bufferPtr);
     std::string toReturn(bufferPtr->data, bufferPtr->length);
-    BIO_set_close(bio, BIO_NOCLOSE);
     BIO_free_all(bio);
 
     return toReturn;