diff --git a/core/embed/rust/src/ui/model_tt/layout.rs b/core/embed/rust/src/ui/model_tt/layout.rs
index 46b645d8aa..b754b8accb 100644
--- a/core/embed/rust/src/ui/model_tt/layout.rs
+++ b/core/embed/rust/src/ui/model_tt/layout.rs
@@ -1718,7 +1718,7 @@ pub static mp_module_trezorui2: Module = obj_module! {
     ///         """Calls drop on contents of the root component."""
     ///
     /// class UiResult:
-    ///     """Result of an UI operation."""
+    ///     """Result of a UI operation."""
     ///     pass
     ///
     /// mock:global
diff --git a/core/mocks/generated/trezorui2.pyi b/core/mocks/generated/trezorui2.pyi
index a8d7004cb1..d33c85b7d5 100644
--- a/core/mocks/generated/trezorui2.pyi
+++ b/core/mocks/generated/trezorui2.pyi
@@ -1147,7 +1147,7 @@ class LayoutObj(Generic[T]):
 
 # rust/src/ui/model_tt/layout.rs
 class UiResult:
-    """Result of an UI operation."""
+    """Result of a UI operation."""
     pass
 CONFIRMED: UiResult
 CANCELLED: UiResult
diff --git a/core/src/main.py b/core/src/main.py
index 87eba676ba..f0c9a54b06 100644
--- a/core/src/main.py
+++ b/core/src/main.py
@@ -29,7 +29,7 @@ if __debug__:
 
 # trezor.pin imports trezor.utils
 # We need it as an always-active module because trezor.pin.show_pin_timeout is used
-# as an UI callback for storage, which can be invoked at any time
+# as a UI callback for storage, which can be invoked at any time
 import trezor.pin  # noqa: F401
 
 # === Prepare the USB interfaces first. Do not connect to the host yet.
diff --git a/python/src/trezorlib/client.py b/python/src/trezorlib/client.py
index 7fd6dae32b..2ec853dfd3 100644
--- a/python/src/trezorlib/client.py
+++ b/python/src/trezorlib/client.py
@@ -100,7 +100,7 @@ class TrezorClient(Generic[UI]):
         You have to provide a `transport`, i.e., a raw connection to the device. You can
         use `trezorlib.transport.get_transport` to find one.
 
-        You have to provide an UI implementation for the three kinds of interaction:
+        You have to provide a UI implementation for the three kinds of interaction:
         - button request (notify the user that their interaction is needed)
         - PIN request (on T1, ask the user to input numbers for a PIN matrix)
         - passphrase request (ask the user to enter a passphrase) See `trezorlib.ui` for