diff --git a/OHHTTPStubs/Sources/OHHTTPStubs.m b/OHHTTPStubs/Sources/OHHTTPStubs.m
index 41871305..2f3cd84d 100644
--- a/OHHTTPStubs/Sources/OHHTTPStubs.m
+++ b/OHHTTPStubs/Sources/OHHTTPStubs.m
@@ -492,6 +492,7 @@ - (void) streamDataForClient:(id<NSURLProtocolClient>)client
                     completion(inputStream.streamError);
                 }
             }
+            free(buffer);
         }
     }
     else