diff --git a/compiler/rustc_middle/src/mir/terminator.rs b/compiler/rustc_middle/src/mir/terminator.rs
index 2fe116212eb52..9357e19f7c579 100644
--- a/compiler/rustc_middle/src/mir/terminator.rs
+++ b/compiler/rustc_middle/src/mir/terminator.rs
@@ -272,7 +272,7 @@ impl<O> AssertKind<O> {
                     "\"misaligned pointer dereference: address must be a multiple of {{}} but is {{}}\", {required:?}, {found:?}"
                 )
             }
-            NullPointerDereference => write!(f, "\"null pointer dereference occured\""),
+            NullPointerDereference => write!(f, "\"null pointer dereference occurred\""),
             ResumedAfterReturn(CoroutineKind::Coroutine(_)) => {
                 write!(f, "\"coroutine resumed after completion\"")
             }
diff --git a/compiler/stable_mir/src/mir/body.rs b/compiler/stable_mir/src/mir/body.rs
index a6406e9db8e35..bc2e427f50cb0 100644
--- a/compiler/stable_mir/src/mir/body.rs
+++ b/compiler/stable_mir/src/mir/body.rs
@@ -307,7 +307,7 @@ impl AssertMessage {
             AssertMessage::MisalignedPointerDereference { .. } => {
                 Ok("misaligned pointer dereference")
             }
-            AssertMessage::NullPointerDereference => Ok("null pointer dereference occured"),
+            AssertMessage::NullPointerDereference => Ok("null pointer dereference occurred"),
         }
     }
 }
diff --git a/compiler/stable_mir/src/mir/pretty.rs b/compiler/stable_mir/src/mir/pretty.rs
index 6638f93e555b5..8278afb7a2f17 100644
--- a/compiler/stable_mir/src/mir/pretty.rs
+++ b/compiler/stable_mir/src/mir/pretty.rs
@@ -299,7 +299,7 @@ fn pretty_assert_message<W: Write>(writer: &mut W, msg: &AssertMessage) -> io::R
             )
         }
         AssertMessage::NullPointerDereference => {
-            write!(writer, "\"null pointer dereference occured.\"")
+            write!(writer, "\"null pointer dereference occurred\"")
         }
         AssertMessage::ResumedAfterReturn(_) | AssertMessage::ResumedAfterPanic(_) => {
             write!(writer, "{}", msg.description().unwrap())
diff --git a/library/core/src/panicking.rs b/library/core/src/panicking.rs
index a89de12c02bdc..b97f19e1baa93 100644
--- a/library/core/src/panicking.rs
+++ b/library/core/src/panicking.rs
@@ -302,7 +302,7 @@ fn panic_null_pointer_dereference() -> ! {
     }
 
     panic_nounwind_fmt(
-        format_args!("null pointer dereference occured"),
+        format_args!("null pointer dereference occurred"),
         /* force_no_backtrace */ false,
     )
 }
diff --git a/tests/ui/mir/null/borrowed_mut_null.rs b/tests/ui/mir/null/borrowed_mut_null.rs
index 437955c452b8b..d26452b9dac29 100644
--- a/tests/ui/mir/null/borrowed_mut_null.rs
+++ b/tests/ui/mir/null/borrowed_mut_null.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ compile-flags: -C debug-assertions
-//@ error-pattern: null pointer dereference occured
+//@ error-pattern: null pointer dereference occurred
 
 fn main() {
     let ptr: *mut u32 = std::ptr::null_mut();
diff --git a/tests/ui/mir/null/borrowed_null.rs b/tests/ui/mir/null/borrowed_null.rs
index eb0794efaa531..fefac3a7212c9 100644
--- a/tests/ui/mir/null/borrowed_null.rs
+++ b/tests/ui/mir/null/borrowed_null.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ compile-flags: -C debug-assertions
-//@ error-pattern: null pointer dereference occured
+//@ error-pattern: null pointer dereference occurred
 
 fn main() {
     let ptr: *const u32 = std::ptr::null();
diff --git a/tests/ui/mir/null/borrowed_null_zst.rs b/tests/ui/mir/null/borrowed_null_zst.rs
index 7b8743e704404..835727c068b33 100644
--- a/tests/ui/mir/null/borrowed_null_zst.rs
+++ b/tests/ui/mir/null/borrowed_null_zst.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ compile-flags: -C debug-assertions
-//@ error-pattern: null pointer dereference occured
+//@ error-pattern: null pointer dereference occurred
 
 fn main() {
     let ptr: *const () = std::ptr::null();
diff --git a/tests/ui/mir/null/null_lhs.rs b/tests/ui/mir/null/null_lhs.rs
index fd3bc3a78b82f..238d350d1bdaf 100644
--- a/tests/ui/mir/null/null_lhs.rs
+++ b/tests/ui/mir/null/null_lhs.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ compile-flags: -C debug-assertions
-//@ error-pattern: null pointer dereference occured
+//@ error-pattern: null pointer dereference occurred
 
 fn main() {
     let ptr: *mut u32 = std::ptr::null_mut();
diff --git a/tests/ui/mir/null/null_rhs.rs b/tests/ui/mir/null/null_rhs.rs
index 45c8beb3fe862..18eafb618698f 100644
--- a/tests/ui/mir/null/null_rhs.rs
+++ b/tests/ui/mir/null/null_rhs.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ compile-flags: -C debug-assertions
-//@ error-pattern: null pointer dereference occured
+//@ error-pattern: null pointer dereference occurred
 
 fn main() {
     let ptr: *mut u32 = std::ptr::null_mut();
diff --git a/tests/ui/mir/null/two_pointers.rs b/tests/ui/mir/null/two_pointers.rs
index d9f0687fe0dbe..52b9510be12eb 100644
--- a/tests/ui/mir/null/two_pointers.rs
+++ b/tests/ui/mir/null/two_pointers.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ compile-flags: -C debug-assertions
-//@ error-pattern: null pointer dereference occured
+//@ error-pattern: null pointer dereference occurred
 
 fn main() {
     let ptr = std::ptr::null();