diff --git a/lib/std/os/uefi.zig b/lib/std/os/uefi.zig
index 1bceab5b2a..4644130e7f 100644
--- a/lib/std/os/uefi.zig
+++ b/lib/std/os/uefi.zig
@@ -98,7 +98,6 @@ pub const Time = extern struct {
 
     /// 0 - 59
     second: u8,
-    _pad1: u8,
 
     /// 0 - 999999999
     nanosecond: u32,
@@ -115,7 +114,6 @@ pub const Time = extern struct {
         /// If true, the time is affected by daylight savings time.
         adjust_daylight: bool,
     },
-    _pad2: u8,
 
     /// Time is to be interpreted as local time
     pub const unspecified_timezone: i16 = 0x7ff;
diff --git a/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig b/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig
index ee79569233..11a5008d9a 100644
--- a/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig
+++ b/lib/std/os/uefi/protocols/absolute_pointer_protocol.zig
@@ -40,9 +40,7 @@ pub const AbsolutePointerMode = extern struct {
     attributes: packed struct {
         supports_alt_active: bool,
         supports_pressure_as_z: bool,
-        _pad1: u6,
-        _pad2: u8,
-        _pad3: u16,
+        _pad: u30 = 0,
     },
 };
 
@@ -53,8 +51,6 @@ pub const AbsolutePointerState = extern struct {
     active_buttons: packed struct {
         touch_active: bool,
         alt_active: bool,
-        _pad1: u6,
-        _pad2: u8,
-        _pad3: u16,
+        _pad: u30 = 0,
     },
 };
diff --git a/lib/std/os/uefi/protocols/edid_override_protocol.zig b/lib/std/os/uefi/protocols/edid_override_protocol.zig
index 8bf848c59a..9540cdc5d4 100644
--- a/lib/std/os/uefi/protocols/edid_override_protocol.zig
+++ b/lib/std/os/uefi/protocols/edid_override_protocol.zig
@@ -26,7 +26,5 @@ pub const EdidOverrideProtocol = extern struct {
 pub const EdidOverrideProtocolAttributes = packed struct {
     dont_override: bool,
     enable_hot_plug: bool,
-    _pad1: u6,
-    _pad2: u8,
-    _pad3: u16,
+    _pad: u30 = 0,
 };
diff --git a/lib/std/os/uefi/protocols/hii.zig b/lib/std/os/uefi/protocols/hii.zig
index 5e3c23d22a..b0b0418611 100644
--- a/lib/std/os/uefi/protocols/hii.zig
+++ b/lib/std/os/uefi/protocols/hii.zig
@@ -48,7 +48,7 @@ pub const NarrowGlyph = extern struct {
     attributes: packed struct {
         non_spacing: bool,
         wide: bool,
-        _pad: u6,
+        _pad: u6 = 0,
     },
     glyph_col_1: [19]u8,
 };
@@ -62,7 +62,7 @@ pub const WideGlyph = extern struct {
     },
     glyph_col_1: [19]u8,
     glyph_col_2: [19]u8,
-    _pad: [3]u8,
+    _pad: [3]u8 = [_]u8{0} ** 3,
 };
 
 pub const HIIStringPackage = extern struct {
diff --git a/lib/std/os/uefi/protocols/simple_network_protocol.zig b/lib/std/os/uefi/protocols/simple_network_protocol.zig
index 01e5986c2d..283d944d34 100644
--- a/lib/std/os/uefi/protocols/simple_network_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_network_protocol.zig
@@ -126,9 +126,7 @@ pub const SimpleNetworkReceiveFilter = packed struct {
     receive_broadcast: bool,
     receive_promiscuous: bool,
     receive_promiscuous_multicast: bool,
-    _pad1: u3 = undefined,
-    _pad2: u8 = undefined,
-    _pad3: u16 = undefined,
+    _pad: u27 = 0,
 };
 
 pub const SimpleNetworkState = enum(u32) {
@@ -171,7 +169,5 @@ pub const SimpleNetworkInterruptStatus = packed struct {
     transmit_interrupt: bool,
     command_interrupt: bool,
     software_interrupt: bool,
-    _pad1: u4,
-    _pad2: u8,
-    _pad3: u16,
+    _pad: u28 = 0,
 };
diff --git a/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig b/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig
index d816deb8cb..fbcebf1121 100644
--- a/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig
+++ b/lib/std/os/uefi/protocols/simple_text_input_ex_protocol.zig
@@ -64,14 +64,14 @@ pub const KeyState = extern struct {
         left_logo_pressed: bool,
         menu_key_pressed: bool,
         sys_req_pressed: bool,
-        _pad1: u21,
+        _pad: u21 = 0,
         shift_state_valid: bool,
     },
     key_toggle_state: packed struct {
         scroll_lock_active: bool,
         num_lock_active: bool,
         caps_lock_active: bool,
-        _pad1: u3,
+        _pad: u3 = 0,
         key_state_exposed: bool,
         toggle_state_valid: bool,
     },
diff --git a/lib/std/os/uefi/tables/boot_services.zig b/lib/std/os/uefi/tables/boot_services.zig
index 7da007b05d..468aaf4cf7 100644
--- a/lib/std/os/uefi/tables/boot_services.zig
+++ b/lib/std/os/uefi/tables/boot_services.zig
@@ -239,9 +239,7 @@ pub const OpenProtocolAttributes = packed struct {
     by_child_controller: bool = false,
     by_driver: bool = false,
     exclusive: bool = false,
-    _pad1: u2 = undefined,
-    _pad2: u8 = undefined,
-    _pad3: u16 = undefined,
+    _pad: u26 = 0,
 };
 
 pub const ProtocolInformationEntry = extern struct {