diff --git a/src/core/GLES_COMPUTE/GCKernelLibrary.cpp b/src/core/GLES_COMPUTE/GCKernelLibrary.cpp
index 25ac02e..0af8c7d 100644
--- a/src/core/GLES_COMPUTE/GCKernelLibrary.cpp
+++ b/src/core/GLES_COMPUTE/GCKernelLibrary.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -387,7 +387,7 @@
     return kernel;
 }
 
-const std::string GCKernelLibrary::preprocess_shader(const std::string &shader_source) const
+std::string GCKernelLibrary::preprocess_shader(const std::string &shader_source) const
 {
     enum class ParserStage
     {
@@ -399,7 +399,7 @@
 
     // Define a GLES compute shader parser function
     std::function<std::string(const std::string &, ParserStage, int)> cs_parser;
-    cs_parser = [&](const std::string & src, ParserStage stage, int nested_level) -> std::string
+    cs_parser = [&](const std::string & src, ParserStage stage, int) -> std::string
     {
         std::string dst;
 
diff --git a/src/core/GLES_COMPUTE/kernels/GCPoolingLayerKernel.cpp b/src/core/GLES_COMPUTE/kernels/GCPoolingLayerKernel.cpp
index f225ebd..50171a1 100644
--- a/src/core/GLES_COMPUTE/kernels/GCPoolingLayerKernel.cpp
+++ b/src/core/GLES_COMPUTE/kernels/GCPoolingLayerKernel.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -333,7 +333,10 @@
     ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
     ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(IKernel::window(), window);
 
-    unsigned int pool_pad_x, pool_pad_y, pool_stride_x, pool_stride_y = 0;
+    unsigned int pool_pad_x;
+    unsigned int pool_pad_y;
+    unsigned int pool_stride_x;
+    unsigned int pool_stride_y;
     std::tie(pool_pad_x, pool_pad_y)       = _pool_info.pad_stride_info().pad();
     std::tie(pool_stride_x, pool_stride_y) = _pool_info.pad_stride_info().stride();