diff --git a/tests/GZip_test.cpp b/tests/GZip_test.cpp
index 1e762b2e..82503d81 100644
--- a/tests/GZip_test.cpp
+++ b/tests/GZip_test.cpp
@@ -24,7 +24,7 @@ slots:
         QByteArray compressed;
         QByteArray decompressed;
         std::default_random_engine eng((std::random_device())());
-        std::uniform_int_distribution<uint8_t> idis(0, std::numeric_limits<uint8_t>::max());
+        std::uniform_int_distribution<uint16_t> idis(0, std::numeric_limits<uint8_t>::max());
 
         // initialize random buffer
         for(int i = 0; i < size; i++)