diff --git a/src/Functions/FunctionStartsEndsWith.h b/src/Functions/FunctionStartsEndsWith.h
index 30d6a150620..69627eb2ead 100644
--- a/src/Functions/FunctionStartsEndsWith.h
+++ b/src/Functions/FunctionStartsEndsWith.h
@@ -141,7 +141,7 @@ template <typename Name>
 class FunctionStartsEndsWith : public TargetSpecific::Default::FunctionStartsEndsWith<Name>
 {
 public:
-    FunctionStartsEndsWith(const Context & context) : selector(context)
+    explicit FunctionStartsEndsWith(const Context & context) : selector(context)
     {
         selector.registerImplementation<TargetArch::Default,
             TargetSpecific::Default::FunctionStartsEndsWith<Name>>();
diff --git a/src/Functions/FunctionsHashing.h b/src/Functions/FunctionsHashing.h
index 7edb8937275..b4c87dd761a 100644
--- a/src/Functions/FunctionsHashing.h
+++ b/src/Functions/FunctionsHashing.h
@@ -655,7 +655,7 @@ template <typename Impl, typename Name>
 class FunctionIntHash : public TargetSpecific::Default::FunctionIntHash<Impl, Name>
 {
 public:
-    FunctionIntHash(const Context & context) : selector(context)
+    explicit FunctionIntHash(const Context & context) : selector(context)
     {
         selector.registerImplementation<TargetArch::Default,
             TargetSpecific::Default::FunctionIntHash<Impl, Name>>();
@@ -981,7 +981,7 @@ template <typename Impl>
 class FunctionAnyHash : public TargetSpecific::Default::FunctionAnyHash<Impl>
 {
 public:
-    FunctionAnyHash(const Context & context) : selector(context)
+    explicit FunctionAnyHash(const Context & context) : selector(context)
     {
         selector.registerImplementation<TargetArch::Default,
             TargetSpecific::Default::FunctionAnyHash<Impl>>();
diff --git a/src/Functions/FunctionsRandom.cpp b/src/Functions/FunctionsRandom.cpp
index ced87d08cfa..fba44d458bb 100644
--- a/src/Functions/FunctionsRandom.cpp
+++ b/src/Functions/FunctionsRandom.cpp
@@ -4,7 +4,9 @@
 #include <Common/HashTable/Hash.h>
 #include <Common/randomSeed.h>
 #include <common/unaligned.h>
-#include <x86intrin.h>
+#if USE_MULTITARGET_CODE
+#  include <x86intrin.h>
+#endif
 
 namespace DB
 {
diff --git a/src/Functions/FunctionsRandom.h b/src/Functions/FunctionsRandom.h
index 346c94e1d9f..bc11f671c1b 100644
--- a/src/Functions/FunctionsRandom.h
+++ b/src/Functions/FunctionsRandom.h
@@ -91,7 +91,7 @@ template <typename ToType, typename Name>
 class FunctionRandom : public FunctionRandomImpl<TargetSpecific::Default::RandImpl, ToType, Name>
 {
 public:
-    FunctionRandom(const Context & context) : selector(context)
+    explicit FunctionRandom(const Context & context) : selector(context)
     {
         selector.registerImplementation<TargetArch::Default,
             FunctionRandomImpl<TargetSpecific::Default::RandImpl, ToType, Name>>();
diff --git a/src/Functions/RandXorshift.h b/src/Functions/RandXorshift.h
index 8e068cf5dff..c005d7377dd 100644
--- a/src/Functions/RandXorshift.h
+++ b/src/Functions/RandXorshift.h
@@ -35,7 +35,7 @@ template <typename ToType, typename Name>
 class FunctionRandomXorshift : public FunctionRandomImpl<TargetSpecific::Default::RandXorshiftImpl, ToType, Name>
 {
 public:
-    FunctionRandomXorshift(const Context & context) : selector(context)
+    explicit FunctionRandomXorshift(const Context & context) : selector(context)
     {
         selector.registerImplementation<TargetArch::Default,
             FunctionRandomImpl<TargetSpecific::Default::RandXorshiftImpl, ToType, Name>>();
diff --git a/src/Functions/generateUUIDv4.cpp b/src/Functions/generateUUIDv4.cpp
index a205f853d2a..53113a77273 100644
--- a/src/Functions/generateUUIDv4.cpp
+++ b/src/Functions/generateUUIDv4.cpp
@@ -61,7 +61,7 @@ public:
 class FunctionGenerateUUIDv4 : public TargetSpecific::Default::FunctionGenerateUUIDv4
 {
 public:
-    FunctionGenerateUUIDv4(const Context & context) : selector(context)
+    explicit FunctionGenerateUUIDv4(const Context & context) : selector(context)
     {
         selector.registerImplementation<TargetArch::Default,
             TargetSpecific::Default::FunctionGenerateUUIDv4>();