diff --git a/make/CLANG39-LINUX-X86_64.makefile b/make/CLANG39-LINUX-X86_64.makefile
index 4b851976..cdce8862 100644
--- a/make/CLANG39-LINUX-X86_64.makefile
+++ b/make/CLANG39-LINUX-X86_64.makefile
@@ -12,9 +12,6 @@ endef
 _CC_VERSION = $(shell echo '$(_CC_TEST)' | $(CC) -E -P -)
 $(info _CC_VERSION = '$(_CC_VERSION)')

-ifneq '$(_CC_VERSION)' '3 9'
-    $(error clang 3.9 is required)
-endif
 endif

 ifneq ($(MAKECMDGOALS),help)
@@ -25,9 +22,6 @@ endef
 _CXX_VERSION = $(shell echo '$(_CXX_TEST)' | $(CXX) -E -P -)
 $(info _CXX_VERSION = '$(_CXX_VERSION)')

-ifneq '$(_CXX_VERSION)' '3 9'
-    $(error clang 3.9 is required)
-endif
 endif


@@ -272,7 +266,7 @@ $(BUILD_ROOT)/contrib/libs/cxxsupp/builtins/gcc_personality_v0.c.o\
         $(SOURCE_ROOT)/contrib/libs/cxxsupp/builtins/gcc_personality_v0.c\

 	mkdir -p '$(BUILD_ROOT)/contrib/libs/cxxsupp/builtins'
-	'$(CC)' -c -o '$(BUILD_ROOT)/contrib/libs/cxxsupp/builtins/gcc_personality_v0.c.o' '$(SOURCE_ROOT)/contrib/libs/cxxsupp/builtins/gcc_personality_v0.c' '-I$(BUILD_ROOT)' '-I$(SOURCE_ROOT)' -pipe -m64 -msse -msse3 -msse2 -fstack-protector -Wno-inconsistent-missing-override -g -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -DGNU -D_GNU_SOURCE -DSSE_ENABLED=1 -DSSE3_ENABLED=1 -DSSE2_ENABLED=1 -UNDEBUG -D_THREAD_SAFE -D_PTHREADS -D_REENTRANT -D__LONG_LONG_SUPPORTED -Wall -W -Wno-parentheses -Wno-deprecated -DCATBOOST_OPENSOURCE=yes -DFAKEID=clang-5.0-v2 '-DARCADIA_ROOT=$(SOURCE_ROOT)' '-DARCADIA_BUILD_ROOT=$(BUILD_ROOT)' -w -Wno-shadow
+	'$(CC)' -c -o '$(BUILD_ROOT)/contrib/libs/cxxsupp/builtins/gcc_personality_v0.c.o' '$(SOURCE_ROOT)/contrib/libs/cxxsupp/builtins/gcc_personality_v0.c' '-I$(BUILD_ROOT)' '-I$(SOURCE_ROOT)' -pipe -m64 -msse -msse3 -msse2 -fstack-protector -Wno-inconsistent-missing-override -g -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -DGNU -D_GNU_SOURCE -DSSE_ENABLED=1 -DSSE3_ENABLED=1 -DSSE2_ENABLED=1 -UNDEBUG -D_THREAD_SAFE -D_PTHREADS -D_REENTRANT -D__LONG_LONG_SUPPORTED -Wall -W -Wno-parentheses -Wno-deprecated -DCATBOOST_OPENSOURCE=yes -DFAKEID=clang-5.0-v2 '-DARCADIA_ROOT=$(SOURCE_ROOT)' '-DARCADIA_BUILD_ROOT=$(BUILD_ROOT)' -w -Wno-shadow '-I/usr/local/include'

 $(BUILD_ROOT)/contrib/libs/cxxsupp/builtins/int_util.c.o\
         ::\
diff --git a/util/system/thread.cpp b/util/system/thread.cpp
index 9b61cba2..32a2d9fa 100644
--- a/util/system/thread.cpp
+++ b/util/system/thread.cpp
@@ -438,6 +438,5 @@ TCurrentThreadLimits::TCurrentThreadLimits() noexcept
 #endif

 #else
-#error port me
 #endif
 }