diff --git a/jemalloc-sys/build.rs b/jemalloc-sys/build.rs
index 4e8ca81..abd475e 100644
--- a/jemalloc-sys/build.rs
+++ b/jemalloc-sys/build.rs
@@ -15,6 +15,16 @@ use std::fs;
 use std::path::PathBuf;
 use std::process::Command;
 
+fn gnu_target(target: &str) -> String {
+    match target {
+        "i686-pc-windows-msvc" => "i686-pc-win32".to_string(),
+        "x86_64-pc-windows-msvc" => "x86_64-pc-win32".to_string(),
+        "i686-pc-windows-gnu" => "i686-w64-mingw32".to_string(),
+        "x86_64-pc-windows-gnu" => "x86_64-w64-mingw32".to_string(),
+        s => s.to_string(),
+    }
+}
+
 fn main() {
     let target = env::var("TARGET").unwrap();
     let host = env::var("HOST").unwrap();
@@ -47,6 +57,12 @@ fn main() {
        .env("CC", compiler.path())
        .env("CFLAGS", cflags);
 
+    // jemalloc's configure doesn't detect this value
+    // automatically for this target:
+    if target == "sparc64-unknown-linux-gnu" {
+        cmd.arg("--with-lg-quantum=4");
+    }
+
     if target.contains("ios") {
         cmd.arg("--disable-tls");
     } else if target.contains("android") {
@@ -62,8 +78,8 @@ fn main() {
     if env::var_os("CARGO_FEATURE_PROFILING").is_some() {
         cmd.arg("--enable-prof");
     }
-    cmd.arg(format!("--host={}", target.replace("windows-gnu", "w64-mingw32")));
-    cmd.arg(format!("--build={}", host.replace("windows-gnu", "w64-mingw32")));
+    cmd.arg(format!("--host={}", gnu_target(&target)));
+    cmd.arg(format!("--build={}", gnu_target(&host)));
     cmd.arg(format!("--prefix={}", out_dir.display()));
 
     run(&mut cmd);
diff --git a/src/lib.rs b/src/lib.rs
index b30cd52..009696a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -39,7 +39,10 @@ const MIN_ALIGN: usize = 8;
               target_arch = "x86_64",
               target_arch = "aarch64",
               target_arch = "powerpc64",
-              target_arch = "powerpc64le")))]
+              target_arch = "powerpc64le",
+              target_arch = "mips64",
+              target_arch = "s390x",
+              target_arch = "sparc64")))]
 const MIN_ALIGN: usize = 16;
 
 // MALLOCX_ALIGN(a) macro