diff --git a/Source/Core/Core/HW/EXI/BBA/BuiltIn.cpp b/Source/Core/Core/HW/EXI/BBA/BuiltIn.cpp
index 86d3f89420..8e9248f830 100644
--- a/Source/Core/Core/HW/EXI/BBA/BuiltIn.cpp
+++ b/Source/Core/Core/HW/EXI/BBA/BuiltIn.cpp
@@ -834,7 +834,7 @@ BbaTcpSocket::ConnectingState BbaTcpSocket::Connected(StackRef* ref)
     fd_set read_fds;
     fd_set write_fds;
     fd_set except_fds;
-    struct timeval t = {0, 0};
+    timeval t = {0, 0};
     FD_ZERO(&read_fds);
     FD_ZERO(&write_fds);
     FD_ZERO(&except_fds);
@@ -965,7 +965,7 @@ sf::Socket::Status BbaUdpSocket::Bind(u16 port, u32 net_ip)
 
   // Subscribe to the SSDP multicast group
   // NB: Other groups aren't supported because of HLE
-  struct ip_mreq mreq;
+  ip_mreq mreq;
   mreq.imr_multiaddr.s_addr = std::bit_cast<u32>(Common::IP_ADDR_SSDP);
   mreq.imr_interface.s_addr = net_ip;
   if (setsockopt(getHandle(), IPPROTO_IP, IP_ADD_MEMBERSHIP, reinterpret_cast<const char*>(&mreq),
diff --git a/Source/Core/Core/HW/WiimoteReal/IOWin.cpp b/Source/Core/Core/HW/WiimoteReal/IOWin.cpp
index f931bb10a3..ffa98292b9 100644
--- a/Source/Core/Core/HW/WiimoteReal/IOWin.cpp
+++ b/Source/Core/Core/HW/WiimoteReal/IOWin.cpp
@@ -197,8 +197,8 @@ void init_lib()
 
 namespace WiimoteReal
 {
-int IOWrite(HANDLE& dev_handle, OVERLAPPED& hid_overlap_write, enum WinWriteMethod& stack,
-            const u8* buf, size_t len, DWORD* written);
+int IOWrite(HANDLE& dev_handle, OVERLAPPED& hid_overlap_write, WinWriteMethod& stack, const u8* buf,
+            size_t len, DWORD* written);
 int IORead(HANDLE& dev_handle, OVERLAPPED& hid_overlap_read, u8* buf, int index);
 
 template <typename T>
diff --git a/Source/Core/Core/IOS/Network/IP/Top.cpp b/Source/Core/Core/IOS/Network/IP/Top.cpp
index 2c078779b9..da350e92ae 100644
--- a/Source/Core/Core/IOS/Network/IP/Top.cpp
+++ b/Source/Core/Core/IOS/Network/IP/Top.cpp
@@ -623,7 +623,7 @@ IPCReply NetIPTopDevice::HandleInetAToNRequest(const IOCtlRequest& request)
   auto& memory = system.GetMemory();
 
   const std::string hostname = memory.GetString(request.buffer_in);
-  struct hostent* remoteHost = gethostbyname(hostname.c_str());
+  hostent* remoteHost = gethostbyname(hostname.c_str());
 
   if (remoteHost == nullptr || remoteHost->h_addr_list == nullptr ||
       remoteHost->h_addr_list[0] == nullptr)
diff --git a/Source/Core/Core/IOS/Network/KD/VFF/VFFUtil.cpp b/Source/Core/Core/IOS/Network/KD/VFF/VFFUtil.cpp
index 4cae4e5e83..738da81f74 100644
--- a/Source/Core/Core/IOS/Network/KD/VFF/VFFUtil.cpp
+++ b/Source/Core/Core/IOS/Network/KD/VFF/VFFUtil.cpp
@@ -27,7 +27,7 @@
 
 static DRESULT read_vff_header(IOS::HLE::FS::FileHandle* vff, FATFS* fs)
 {
-  struct IOS::HLE::NWC24::VFFHeader header;
+  IOS::HLE::NWC24::VFFHeader header;
   if (!vff->Read(&header, 1))
   {
     ERROR_LOG_FMT(IOS_WC24, "Failed to read VFF header.");
diff --git a/Source/Core/Core/IOS/Network/Socket.cpp b/Source/Core/Core/IOS/Network/Socket.cpp
index 59f8e31814..e1f9b9d533 100644
--- a/Source/Core/Core/IOS/Network/Socket.cpp
+++ b/Source/Core/Core/IOS/Network/Socket.cpp
@@ -770,7 +770,7 @@ WiiSocket::ConnectingState WiiSocket::GetConnectingState() const
     fd_set read_fds;
     fd_set write_fds;
     fd_set except_fds;
-    struct timeval t = {0, 0};
+    timeval t = {0, 0};
     FD_ZERO(&read_fds);
     FD_ZERO(&write_fds);
     FD_ZERO(&except_fds);
@@ -998,7 +998,7 @@ void WiiSockMan::Update()
 {
   s32 nfds = 0;
   fd_set read_fds, write_fds, except_fds;
-  struct timeval t = {0, 0};
+  timeval t = {0, 0};
   FD_ZERO(&read_fds);
   FD_ZERO(&write_fds);
   FD_ZERO(&except_fds);
diff --git a/Source/Core/Core/IOS/USB/Bluetooth/hci.h b/Source/Core/Core/IOS/USB/Bluetooth/hci.h
index c11fef908a..c42a42aae7 100644
--- a/Source/Core/Core/IOS/USB/Bluetooth/hci.h
+++ b/Source/Core/Core/IOS/USB/Bluetooth/hci.h
@@ -2505,7 +2505,7 @@ struct hci_filter
   uint32_t mask[8]; /* 256 bits */
 };
 
-static __inline void hci_filter_set(uint8_t bit, struct hci_filter* filter)
+static __inline void hci_filter_set(uint8_t bit, hci_filter* filter)
 {
   uint8_t off = bit - 1;
 
@@ -2513,7 +2513,7 @@ static __inline void hci_filter_set(uint8_t bit, struct hci_filter* filter)
   filter->mask[off] |= (1 << ((bit - 1) & 0x1f));
 }
 
-static __inline void hci_filter_clr(uint8_t bit, struct hci_filter* filter)
+static __inline void hci_filter_clr(uint8_t bit, hci_filter* filter)
 {
   uint8_t off = bit - 1;
 
@@ -2581,7 +2581,7 @@ struct btreq
       uint16_t btri_link_policy; /* Link Policy */
       uint16_t btri_packet_type; /* Packet Type */
     } btri;
-    struct bt_stats btrs; /* unit stats */
+    bt_stats btrs; /* unit stats */
   } btru;
 };
 
diff --git a/Source/Core/Core/PowerPC/GDBStub.cpp b/Source/Core/Core/PowerPC/GDBStub.cpp
index c293977aeb..bbd72b8391 100644
--- a/Source/Core/Core/PowerPC/GDBStub.cpp
+++ b/Source/Core/Core/PowerPC/GDBStub.cpp
@@ -258,7 +258,7 @@ static void ReadCommand()
 
 static bool IsDataAvailable()
 {
-  struct timeval t;
+  timeval t;
   fd_set _fds, *fds = &_fds;
 
   FD_ZERO(fds);