diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index da9e9fdda..2be455679 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -273,5 +273,11 @@ endif()
 if (MSVC)
     target_compile_options(video_core PRIVATE /we4267)
 else()
-    target_compile_options(video_core PRIVATE -Werror=conversion -Wno-error=sign-conversion -Werror=switch)
+    target_compile_options(video_core PRIVATE
+        -Werror=conversion
+        -Wno-error=sign-conversion
+        -Werror=switch
+        -Werror=unused-variable
+        -Werror=unused-but-set-variable
+    )
 endif()
diff --git a/src/video_core/engines/maxwell_dma.cpp b/src/video_core/engines/maxwell_dma.cpp
index e88290754..8fa359d0a 100644
--- a/src/video_core/engines/maxwell_dma.cpp
+++ b/src/video_core/engines/maxwell_dma.cpp
@@ -114,8 +114,6 @@ void MaxwellDMA::CopyBlockLinearToPitch() {
     const u32 block_depth = src_params.block_size.depth;
     const size_t src_size =
         CalculateSize(true, bytes_per_pixel, width, height, depth, block_height, block_depth);
-    const size_t src_layer_size =
-        CalculateSize(true, bytes_per_pixel, width, height, 1, block_height, block_depth);
 
     if (read_buffer.size() < src_size) {
         read_buffer.resize(src_size);
diff --git a/src/video_core/renderer_opengl/gl_device.cpp b/src/video_core/renderer_opengl/gl_device.cpp
index e7d95149f..a94e4f72e 100644
--- a/src/video_core/renderer_opengl/gl_device.cpp
+++ b/src/video_core/renderer_opengl/gl_device.cpp
@@ -193,7 +193,6 @@ bool IsASTCSupported() {
 Device::Device()
     : max_uniform_buffers{BuildMaxUniformBuffers()}, base_bindings{BuildBaseBindings()} {
     const std::string_view vendor = reinterpret_cast<const char*>(glGetString(GL_VENDOR));
-    const std::string_view renderer = reinterpret_cast<const char*>(glGetString(GL_RENDERER));
     const std::string_view version = reinterpret_cast<const char*>(glGetString(GL_VERSION));
     const std::vector extensions = GetExtensions();