diff --git a/src/armnn/Network.cpp b/src/armnn/Network.cpp
index d164759..53e28c3 100644
--- a/src/armnn/Network.cpp
+++ b/src/armnn/Network.cpp
@@ -842,6 +842,7 @@
     if (options.m_ReduceFp32ToFp16)
     {
         Optimizer::Pass(optGraph, MakeOptimizations(Fp32NetworkToFp16Converter()));
+        Optimizer::Pass(optGraph, MakeOptimizations(ConvertConstantsFloatToHalf()));
     }
 
     // Initialize backend settings