3 files changed, 4 insertions, 4 deletions
diff --git a/Source/Core/Common/Hash.cpp b/Source/Core/Common/Hash.cpp
index a3984745f5..3756bdcad4 100644
--- a/Source/Core/Common/Hash.cpp
+++ b/Source/Core/Common/Hash.cpp
@@ -427,7 +427,7 @@ u64 GetHash64(const u8* src, u32 len, u32 samples)
 
 u32 StartCRC32()
 {
-  return crc32_z(0L, Z_NULL, 0);
+  return crc32_z(0L, nullptr, 0);
 }
 
 u32 UpdateCRC32(u32 crc, const u8* data, size_t len)
diff --git a/Source/Core/Common/MemArenaUnix.cpp b/Source/Core/Common/MemArenaUnix.cpp
index fd4af4e74b..26a123c081 100644
--- a/Source/Core/Common/MemArenaUnix.cpp
+++ b/Source/Core/Common/MemArenaUnix.cpp
@@ -149,8 +149,8 @@ void* LazyMemoryRegion::Create(size_t size)
   if (size == 0)
     return nullptr;
 
-  void* memory =
-      mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
+  void* memory = mmap(nullptr, size, PROT_READ | PROT_WRITE,
+                      MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
   if (memory == MAP_FAILED)
   {
     NOTICE_LOG_FMT(MEMMAP, "Memory allocation of {} bytes failed.", size);
diff --git a/Source/Core/Common/TimeUtil.cpp b/Source/Core/Common/TimeUtil.cpp
index e57078b7e9..fa47e23503 100644
--- a/Source/Core/Common/TimeUtil.cpp
+++ b/Source/Core/Common/TimeUtil.cpp
@@ -17,7 +17,7 @@ std::optional<std::tm> LocalTime(std::time_t time)
 #ifdef _MSC_VER
   if (localtime_s(&local_time, &time) != 0)
 #else
-  if (localtime_r(&time, &local_time) == NULL)
+  if (localtime_r(&time, &local_time) == nullptr)
 #endif
   {
     ERROR_LOG_FMT(COMMON, "Failed to convert time to local time: {}", std::strerror(errno));