diff --git a/Telegram/gyp/PrecompiledHeader.cmake b/Telegram/gyp/PrecompiledHeader.cmake
index d56033842c..5d6830e963 100644
--- a/Telegram/gyp/PrecompiledHeader.cmake
+++ b/Telegram/gyp/PrecompiledHeader.cmake
@@ -75,7 +75,7 @@ function(export_all_flags _filename _source_name_for_flags)
   set(_compile_definitions "$<$<BOOL:${_compile_definitions}>:-D$<JOIN:${_compile_definitions},\n-D>\n>")
   set(_compile_flags "$<$<BOOL:${_compile_flags}>:$<JOIN:${_compile_flags},\n>\n>")
   set(_compile_options "$<$<BOOL:${_compile_options}>:$<JOIN:${_compile_options},\n>\n>")
-  file(GENERATE OUTPUT "${_filename}" CONTENT "${_source_name_for_flags}\n${_compile_definitions}${_include_directories}${_compile_flags}${_compile_options}\n")
+  file(GENERATE OUTPUT "${_filename}" CONTENT "${_compile_definitions}${_include_directories}${_compile_flags}${_compile_options}\n")
 endfunction()
 
 function(add_precompiled_header _target _input)
@@ -123,7 +123,7 @@ function(add_precompiled_header _target _input)
       set(_compiler_FLAGS "@${_pch_cpp_flags_file}")
       add_custom_command(
         OUTPUT "${_output_cxx}"
-        COMMAND "${CMAKE_CXX_COMPILER}" ${_compiler_FLAGS} -std=gnu++1y -x c++-header -o "${_output_cxx}" -c "${_pchfile}"
+        COMMAND "${CMAKE_CXX_COMPILER}" ${_compiler_FLAGS} -x c++-header -o "${_output_cxx}" -c "${_pchfile}"
         DEPENDS "${_pchfile}" "${_pch_cpp_flags_file}"
         IMPLICIT_DEPENDS CXX "${_pch_header}"
         COMMENT "Precompiling ${_name} for ${_target} (C++)")
@@ -139,9 +139,9 @@ function(add_precompiled_header _target _input)
         endif()
         separate_arguments(_pch_compile_flags)
         if(_source MATCHES \\.\(cc|cxx|cpp\)$)
-          list(APPEND _pch_compile_flags -Winvalid-pch -include "${_pchfile}")
+          list(APPEND _pch_compile_flags -include "${_pchfile}")
         else()
-          list(APPEND _pch_compile_flags -Winvalid-pch "-I${_pch_binary_dir}")
+          list(APPEND _pch_compile_flags "-I${_pch_binary_dir}")
         endif()
 
         get_source_file_property(_object_depends "${_source}" OBJECT_DEPENDS)
diff --git a/Telegram/gyp/settings_linux.gypi b/Telegram/gyp/settings_linux.gypi
index a723ac9ea2..4cdf7a5ba7 100644
--- a/Telegram/gyp/settings_linux.gypi
+++ b/Telegram/gyp/settings_linux.gypi
@@ -64,12 +64,13 @@
         'QT_STATICPLUGIN',
         'QT_PLUGIN',
       ],
-      'cflags': [
+      'cflags_c': [
         '<@(linux_common_flags)',
+        '-std=gnu11',
       ],
       'cflags_cc': [
         '<@(linux_common_flags)',
-        '-std=gnu++1y',
+        '-std=gnu++14',
       ],
       'configurations': {
         'Debug': {