diff --git a/libraries/HTTPClient/src/HTTPClient.cpp b/libraries/HTTPClient/src/HTTPClient.cpp
index e6e448cb5d96c62581e060b326ea1bfdbebd9d2d..0383c14959789aef78ba6f0cc12d26c18aab58c6 100644
--- a/libraries/HTTPClient/src/HTTPClient.cpp
+++ b/libraries/HTTPClient/src/HTTPClient.cpp
@@ -921,13 +921,16 @@ String HTTPClient::getString(void)
 {
     StreamString sstring;
 
-    if(_size) {
+    if(_size > 0) {
         // try to reserve needed memmory
         if(!sstring.reserve((_size + 1))) {
             log_d("not enough memory to reserve a string! need: %d", (_size + 1));
             return "";
         }
     }
+    else {
+        return "";
+    }
 
     writeToStream(&sstring);
     return sstring;