2 files changed, 8 insertions, 1 deletions
diff --git a/src/liballoc_jemalloc/build.rs b/src/liballoc_jemalloc/build.rs
index 2bbec9e5fc2..1edcb0b1f24 100644
--- a/src/liballoc_jemalloc/build.rs
+++ b/src/liballoc_jemalloc/build.rs
@@ -151,6 +151,12 @@ fn main() {
     cmd.arg(format!("--host={}", build_helper::gnu_target(&target)));
     cmd.arg(format!("--build={}", build_helper::gnu_target(&host)));
 
+    // for some reason, jemalloc configure doesn't detect this value
+    // automatically for this target
+    if target == "sparc64-unknown-linux-gnu" {
+        cmd.arg("--with-lg-quantum=4");
+    }
+
     run(&mut cmd);
     let mut make = Command::new(build_helper::make(&host));
     make.current_dir(&build_dir)
diff --git a/src/liballoc_jemalloc/lib.rs b/src/liballoc_jemalloc/lib.rs
index 21e45f9c4b2..f2df393ad77 100644
--- a/src/liballoc_jemalloc/lib.rs
+++ b/src/liballoc_jemalloc/lib.rs
@@ -84,7 +84,8 @@ mod imp {
                   target_arch = "aarch64",
                   target_arch = "powerpc64",
                   target_arch = "mips64",
-                  target_arch = "s390x")))]
+                  target_arch = "s390x",
+                  target_arch = "sparc64")))]
     const MIN_ALIGN: usize = 16;
 
     // MALLOCX_ALIGN(a) macro