diff --git a/lib/src/SDK/Image.cpp b/lib/src/SDK/Image.cpp
index c17a3d14..2be3b576 100644
--- a/lib/src/SDK/Image.cpp
+++ b/lib/src/SDK/Image.cpp
@@ -44,11 +44,12 @@ namespace sdk {
                                          err_msg.c_str());
         }
 
-        im.pixels.insert(im.pixels.end(), data,
-                         data + im.width * im.height * im.pixel_size);
+        std::size_t data_size = im.width * im.height * im.pixel_size;
+
+        im.pixels.insert(im.pixels.end(), data, data + data_size);
 
         if (im.width && im.height && im.pixel_size
-            && im.pixels.size() == im.width * im.height * im.pixel_size)
+            && im.pixels.size() == data_size)
             err = CL_SUCCESS;
         else
             cl::util::detail::errHandler(CL_INVALID_ARG_VALUE, &err,
diff --git a/lib/src/Utils/File.cpp b/lib/src/Utils/File.cpp
index a62efb62..4ff44f23 100644
--- a/lib/src/Utils/File.cpp
+++ b/lib/src/Utils/File.cpp
@@ -97,7 +97,7 @@ cl_int cl::util::write_binaries(const cl::Program::Binaries& binaries,
     {
         try
         {
-            for (auto i = 0; i < binaries.size(); ++i)
+            for (auto i = 0U; i < binaries.size(); ++i)
             {
                 string binary_name = string(program_file_name) + "-"
                     + devices.at(i).getInfo<CL_DEVICE_NAME>() + ".bin";
diff --git a/samples/core/blur/blur.cpp b/samples/core/blur/blur.cpp
index c19eca91..06f6dd52 100644
--- a/samples/core/blur/blur.cpp
+++ b/samples/core/blur/blur.cpp
@@ -732,9 +732,9 @@ void BlurCppExample::finalize_blur()
     // restore image type if needed
     if (input_image.pixel_size != output_image.pixel_size)
     {
-        const auto pixels = input_image.width * input_image.height,
-                   pixel_size = output_image.pixel_size;
-        for (size_t i = 1; i < pixels; ++i)
+        const std::size_t pixels = input_image.width * input_image.height,
+                          pixel_size = output_image.pixel_size;
+        for (std::size_t i = 1; i < pixels; ++i)
             memcpy(output_image.pixels.data() + pixel_size * i,
                    output_image.pixels.data() + 4 * i, pixel_size);
     }
diff --git a/samples/core/copybuffer/main.cpp b/samples/core/copybuffer/main.cpp
index e9b53f45..5429afa6 100644
--- a/samples/core/copybuffer/main.cpp
+++ b/samples/core/copybuffer/main.cpp
@@ -95,7 +95,7 @@ int main(int argc, char** argv)
     }
     else
     {
-        for (size_t i = 1; i < argc; i++)
+        for (int i = 1; i < argc; i++)
         {
             if (!strcmp(argv[i], "-d"))
             {
diff --git a/samples/core/copybufferkernel/main.cpp b/samples/core/copybufferkernel/main.cpp
index 26d046d6..1b14cfc2 100644
--- a/samples/core/copybufferkernel/main.cpp
+++ b/samples/core/copybufferkernel/main.cpp
@@ -106,7 +106,7 @@ int main(int argc, char** argv)
     }
     else
     {
-        for (size_t i = 1; i < argc; i++)
+        for (int i = 1; i < argc; i++)
         {
             if (!strcmp(argv[i], "-d"))
             {