diff --git a/src/HttpParser.h b/src/HttpParser.h
index 8e33335..277b613 100644
--- a/src/HttpParser.h
+++ b/src/HttpParser.h
@@ -314,7 +314,7 @@ public:
         } else if (fallback.length()) {
             unsigned int had = (unsigned int) fallback.length();
 
-            size_t maxCopyDistance = std::min(MAX_FALLBACK_SIZE - fallback.length(), (size_t) length);
+            size_t maxCopyDistance = std::min<size_t>(MAX_FALLBACK_SIZE - fallback.length(), (size_t) length);
 
             /* We don't want fallback to be short string optimized, since we want to move it */
             fallback.reserve(fallback.length() + maxCopyDistance + std::max<unsigned int>(MINIMUM_HTTP_POST_PADDING, sizeof(std::string)));