diff --git a/src/bootstrap/bin/rustc.rs b/src/bootstrap/bin/rustc.rs
index e6102de18748..efbfc3796ae2 100644
--- a/src/bootstrap/bin/rustc.rs
+++ b/src/bootstrap/bin/rustc.rs
@@ -97,8 +97,6 @@ fn main() {
         cmd.env("RUST_BACKTRACE", "1");
     }
 
-    cmd.env("RUSTC_BREAK_ON_ICE", "1");
-
     if let Ok(debuginfo_level) = env::var("RUSTC_DEBUGINFO_LEVEL") {
         cmd.arg(format!("-Cdebuginfo={}", debuginfo_level));
     }
diff --git a/src/bootstrap/builder.rs b/src/bootstrap/builder.rs
index 6323fa94ccfc..0704ff3ca9bc 100644
--- a/src/bootstrap/builder.rs
+++ b/src/bootstrap/builder.rs
@@ -917,7 +917,8 @@ impl<'a> Builder<'a> {
                     PathBuf::from("/path/to/nowhere/rustdoc/not/required")
                 },
             )
-            .env("RUSTC_ERROR_METADATA_DST", self.extended_error_dir());
+            .env("RUSTC_ERROR_METADATA_DST", self.extended_error_dir())
+            .env("RUSTC_BREAK_ON_ICE", "1");
 
         if let Some(host_linker) = self.linker(compiler.host) {
             cargo.env("RUSTC_HOST_LINKER", host_linker);