diff --git a/librocksdb-sys/build.rs b/librocksdb-sys/build.rs
index 1b1567a..e2c35aa 100644
--- a/librocksdb-sys/build.rs
+++ b/librocksdb-sys/build.rs
@@ -98,10 +98,10 @@ fn build_rocksdb() {
         // (about 2011).
         config.define("HAVE_PCLMUL", Some("1"));
         config.define("HAVE_SSE42", Some("1"));
-        config.flag("-msse2");
-        config.flag("-msse4.1");
-        config.flag("-msse4.2");
-        config.flag("-mpclmul");
+        config.flag_if_supported("-msse2");
+        config.flag_if_supported("-msse4.1");
+        config.flag_if_supported("-msse4.2");
+        config.flag_if_supported("-mpclmul");
     }
 
     if target.contains("darwin") {