diff --git a/dbms/src/IO/ReadHelpers.h b/dbms/src/IO/ReadHelpers.h
index c19fa173940..40af563d19b 100644
--- a/dbms/src/IO/ReadHelpers.h
+++ b/dbms/src/IO/ReadHelpers.h
@@ -640,7 +640,6 @@ inline void readBinary(String & x, ReadBuffer & buf) { readStringBinary(x, buf);
 inline void readBinary(UInt128 & x, ReadBuffer & buf) { readPODBinary(x, buf); }
 inline void readBinary(UInt256 & x, ReadBuffer & buf) { readPODBinary(x, buf); }
 inline void readBinary(LocalDate & x, ReadBuffer & buf) { readPODBinary(x, buf); }
-inline void readBinary(LocalDateTime & x, ReadBuffer & buf) { readPODBinary(x, buf); }
 
 
 /// Generic methods to read value in text tab-separated format.
diff --git a/libs/libcommon/include/common/LocalDateTime.h b/libs/libcommon/include/common/LocalDateTime.h
index 44d24d16dbd..d5c800c621f 100644
--- a/libs/libcommon/include/common/LocalDateTime.h
+++ b/libs/libcommon/include/common/LocalDateTime.h
@@ -27,7 +27,7 @@ private:
 
     /// For struct to fill 8 bytes and for safe invocation of memcmp.
     /// NOTE We may use attribute packed instead, but it is less portable.
-    unsigned char pad [[maybe_unused]] = 0;
+    unsigned char pad = 0;
 
     void init(time_t time)
     {
@@ -88,7 +88,7 @@ public:
         init(s.data(), s.size());
     }
 
-    LocalDateTime() : m_year(0), m_month(0), m_day(0), m_hour(0), m_minute(0), m_second(0)
+    LocalDateTime() : m_year(0), m_month(0), m_day(0), m_hour(0), m_minute(0), m_second(0), pad(0)
     {
     }