diff --git a/src/librustc_builtin_macros/format.rs b/src/librustc_builtin_macros/format.rs
index 019432035fe344e49c709b6b07d8f23b29b0346f..4cc83f8e31c20de2e61fa8cbe288dd1625fd712c 100644
--- a/src/librustc_builtin_macros/format.rs
+++ b/src/librustc_builtin_macros/format.rs
@@ -537,7 +537,7 @@ fn verify_arg_type(&mut self, arg: Position, ty: ArgumentType) {
                                     name
                                 ));
                                 err.note(
-                                    "to avoid ambiguity format_args! cannot capture variables \
+                                    "to avoid ambiguity, `format_args!` cannot capture variables \
                                      when the format string is expanded from a macro",
                                 );
                             } else if self.ecx.parse_sess().unstable_features.is_nightly_build() {
diff --git a/src/test/ui/fmt/format-args-capture-macro-hygiene.stderr b/src/test/ui/fmt/format-args-capture-macro-hygiene.stderr
index 55bd97bafe8b3c5a1da342592df583cd63827ed7..0c5915149cd6010830f74e3c453e85225ef0a32c 100644
--- a/src/test/ui/fmt/format-args-capture-macro-hygiene.stderr
+++ b/src/test/ui/fmt/format-args-capture-macro-hygiene.stderr
@@ -5,7 +5,7 @@ LL |     format!(concat!("{foo}"));
    |             ^^^^^^^^^^^^^^^^
    |
    = note: did you intend to capture a variable `foo` from the surrounding scope?
-   = note: to avoid ambiguity format_args! cannot capture variables when the format string is expanded from a macro
+   = note: to avoid ambiguity, `format_args!` cannot capture variables when the format string is expanded from a macro
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: there is no argument named `bar`
@@ -15,7 +15,7 @@ LL |     format!(concat!("{ba", "r} {}"), 1);
    |             ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: did you intend to capture a variable `bar` from the surrounding scope?
-   = note: to avoid ambiguity format_args! cannot capture variables when the format string is expanded from a macro
+   = note: to avoid ambiguity, `format_args!` cannot capture variables when the format string is expanded from a macro
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to 2 previous errors