diff --git a/src/CPUPipe.cpp b/src/CPUPipe.cpp
index c898fe86b..94e46a010 100644
--- a/src/CPUPipe.cpp
+++ b/src/CPUPipe.cpp
@@ -72,7 +72,7 @@ void CPUPipe::winograd_transform_in(const std::vector<float>& in,
 
     constexpr auto buffersize = 32;
 
-    std::array<std::array<float, Wpad>, Wpad> in_pad{0.0f};
+    std::array<std::array<float, Wpad>, Wpad> in_pad{{{0.0f}}};
 
     std::array<float, buffersize * WINOGRAD_ALPHA * WINOGRAD_ALPHA> buffer;
     auto buffer_offset = 0;
diff --git a/src/Makefile b/src/Makefile
index 299662727..fe89fa22c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -3,21 +3,21 @@ THE_OS := $(shell uname -s)
 default:
 	@echo "Detected OS: ${THE_OS}"
 	$(MAKE) CC=gcc CXX=g++ \
-		CXXFLAGS='$(CXXFLAGS) -Wall -Wextra -Wno-ignored-attributes -Wno-deprecated-copy -pipe -O3 -g -ffast-math -flto -march=native -std=c++14 -DNDEBUG'  \
+		CXXFLAGS='$(CXXFLAGS) -Wall -Wextra -Wno-deprecated-copy -pipe -O3 -g -ffast-math -flto -march=native -std=c++14 -DNDEBUG' \
 		LDFLAGS='$(LDFLAGS) -flto -g' \
 		leelaz
 
 debug:
 	@echo "Detected OS: ${THE_OS}"
 	$(MAKE) CC=gcc CXX=g++ \
-		CXXFLAGS='$(CXXFLAGS) -Wall -Wextra -Wno-ignored-attributes -Wno-deprecated-copy -pipe -Og -g -std=c++14' \
+		CXXFLAGS='$(CXXFLAGS) -Wall -Wextra -Wno-deprecated-copy -pipe -Og -g -std=c++14' \
 		LDFLAGS='$(LDFLAGS) -g' \
 		leelaz
 
 clang:
 	@echo "Detected OS: ${THE_OS}"
 	$(MAKE) CC=clang CXX=clang++ \
-		CXXFLAGS='$(CXXFLAGS) -Wall -Wextra -Wno-missing-braces -O3 -ffast-math -flto -march=native -std=c++14 -DNDEBUG' \
+		CXXFLAGS='$(CXXFLAGS) -Wall -Wextra -Wno-deprecated-copy -O3 -ffast-math -flto -march=native -std=c++14 -DNDEBUG' \
 		LDFLAGS='$(LDFLAGS) -flto -fuse-linker-plugin' \
 		leelaz
 
diff --git a/src/Network.h b/src/Network.h
index 9f2d705d8..30aad64ef 100644
--- a/src/Network.h
+++ b/src/Network.h
@@ -77,6 +77,8 @@ class Network {
     using PolicyVertexPair = std::pair<float,int>;
     using Netresult = NNCache::Netresult;
 
+    virtual ~Network() = default;
+
     Netresult get_output(const GameState* const state,
                          const Ensemble ensemble,
                          const int symmetry = -1,