diff --git a/src/de.rs b/src/de.rs
index 491ae47..b5633ea 100644
--- a/src/de.rs
+++ b/src/de.rs
@@ -1035,13 +1035,12 @@ impl<'a> Deserializer<'a> {
         let start = self.tokens.substr_offset(date);
 
         // Check for space separated date and time.
-        if let Some((_, Token::Whitespace(s))) = self.peek()? {
-            if s == " " {
-                self.next()?;
-                // Skip past the hour.
-                if let Some((_, Token::Keylike(_))) = self.peek()? {
-                    self.next()?;
-                }
+        let mut lookahead = self.tokens.clone();
+        if let Ok(Some((_, Token::Whitespace(" ")))) = lookahead.next() {
+            // Check if hour follows.
+            if let Ok(Some((_, Token::Keylike(_)))) = lookahead.next() {
+                self.next()?;  // skip space
+                self.next()?;  // skip keylike hour
             }
         }
 
diff --git a/test-suite/tests/datetime.rs b/test-suite/tests/datetime.rs
index f3b77e3..a0064fb 100644
--- a/test-suite/tests/datetime.rs
+++ b/test-suite/tests/datetime.rs
@@ -21,6 +21,8 @@ fn times() {
     good("1997-09-09T09:09:09-09:09");
     good("1997-09-09T09:09:09");
     good("1997-09-09");
+    dogood("1997-09-09 ", "1997-09-09");
+    dogood("1997-09-09 # comment", "1997-09-09");
     good("09:09:09");
     good("1997-09-09T09:09:09.09Z");
     good("1997-09-09T09:09:09.09+09:09");