diff --git a/nc_warnings.cmake b/nc_warnings.cmake
index 18fe473..f4fdfc4 100644
--- a/nc_warnings.cmake
+++ b/nc_warnings.cmake
@@ -49,6 +49,16 @@ append_compile_flag(-Wduplicated-cond)
 # see gcc#70844
 append_compile_flag(-Wuseless-cast)
 
+# gcc 7 warnings
+append_compile_flag(-Wduplicated-branches)
+append_compile_flag(-Wrestrict)
+append_compile_flag(-Wregister)
+append_compile_flag(-Wdangling-else)
+append_compile_flag(-Walloc-zero)
+append_compile_flag(-Walloca)
+append_compile_flag(-Wnonnull)
+append_compile_flag(-Waligned-new)
+
 # clang 3.7.1 warnings
 append_compile_flag(-Wshorten-64-to-32)
 append_compile_flag(-Wdeprecated)