diff --git a/src/librustdoc/html/render.rs b/src/librustdoc/html/render.rs
index e161f40b7295..52257653405e 100644
--- a/src/librustdoc/html/render.rs
+++ b/src/librustdoc/html/render.rs
@@ -1888,11 +1888,13 @@ fn short_stability(item: &clean::Item, cx: &Context, show_reason: bool) -> Vec<S
                 if stab.unstable_reason.is_empty() {
                     stability.push(format!("<div class='stab unstable'>\
                                             <span class=microscope>🔬</span> \
-                                            This is a nightly-only experimental API. {}</div>",
+                                            This is a nightly-only experimental API. &nbsp;{}\
+                                            </div>",
                                    unstable_extra));
                 } else {
                     let text = format!("<summary><span class=microscope>🔬</span> \
-                                        This is a nightly-only experimental API. {}</summary>{}",
+                                        This is a nightly-only experimental API. &nbsp;{}\
+                                        </summary>{}",
                                        unstable_extra, MarkdownHtml(&stab.unstable_reason));
                     stability.push(format!("<div class='stab unstable'><details>{}</details></div>",
                                    text));
diff --git a/src/test/rustdoc/issue-32374.rs b/src/test/rustdoc/issue-32374.rs
index b5edf535057d..5cca37082920 100644
--- a/src/test/rustdoc/issue-32374.rs
+++ b/src/test/rustdoc/issue-32374.rs
@@ -21,7 +21,7 @@
 // @has - '<code>test</code>'
 // @has - '<a href="http://issue_url/32374">#32374</a>'
 // @matches issue_32374/struct.T.html '//*[@class="stab unstable"]' \
-//      '🔬 This is a nightly-only experimental API.  \(test #32374\)$'
+//      '🔬 This is a nightly-only experimental API.   \(test #32374\)$'
 #[rustc_deprecated(since = "1.0.0", reason = "text")]
 #[unstable(feature = "test", issue = "32374")]
 pub struct T;