diff --git a/botocore/crt/auth.py b/botocore/crt/auth.py
index 9919e20f46..d926f38a5a 100644
--- a/botocore/crt/auth.py
+++ b/botocore/crt/auth.py
@@ -114,7 +114,7 @@ def _crt_request_from_aws_request(self, aws_request):
         if aws_request.params:
             array = []
             for param, value in aws_request.params.items():
-                value = str(value)
+                value = value.decode("utf-8") if isinstance(value, bytes) else str(value)
                 array.append(f'{param}={value}')
             crt_path = crt_path + '?' + '&'.join(array)
         elif url_parts.query:
@@ -312,7 +312,7 @@ def _crt_request_from_aws_request(self, aws_request):
         if aws_request.params:
             array = []
             for param, value in aws_request.params.items():
-                value = str(value)
+                value = value.decode("utf-8") if isinstance(value, bytes) else str(value)
                 array.append(f'{param}={value}')
             crt_path = crt_path + '?' + '&'.join(array)
         elif url_parts.query: