diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs
index bec0b11acd0..da60166b84d 100644
--- a/src/bootstrap/config.rs
+++ b/src/bootstrap/config.rs
@@ -2004,7 +2004,8 @@ pub fn check_build_rustc_version(&self, rustc_path: &str) {
                 .unwrap();
         if !(source_version == rustc_version
             || (source_version.major == rustc_version.major
-                && source_version.minor == rustc_version.minor + 1))
+                && (source_version.minor == rustc_version.minor
+                    || source_version.minor == rustc_version.minor + 1)))
         {
             let prev_version = format!("{}.{}.x", source_version.major, source_version.minor - 1);
             eprintln!(