diff --git a/jni/interface.c b/jni/interface.c
index e29f81f..099c833 100644
--- a/jni/interface.c
+++ b/jni/interface.c
@@ -31,7 +31,7 @@ jni_init(JNIEnv *env_)
 	CLASS(string, "java/lang/String")
 	CLASS(simplesshdservice, "org/galexander/sshd/SimpleSSHDService")
 
-	FIELD(sss_sshd_pid, simplesshdservice, "sshd_pid", "I")
+	STFIELD(sss_sshd_pid, simplesshdservice, "sshd_pid", "I")
 
 	return 1;
 }
@@ -48,7 +48,7 @@ Java_org_galexander_sshd_SimpleSSHDService_start_1sshd(JNIEnv *env_,
 	if (pid == 0) {
 		/* XXX - call dropbear main() */
 	} else {
-		(*env)->SetIntField(env, this, fid_sss_sshd_pid, pid);
+		(*env)->SetStaticIntField(env, cl_simplesshdservice, fid_sss_sshd_pid, pid);
 	}
 }
 
@@ -59,7 +59,7 @@ Java_org_galexander_sshd_SimpleSSHDService_stop_1sshd(JNIEnv *env_, jobject this
 	if (!jni_init(env_)) {
 		return;
 	}
-	pid = (*env)->GetIntField(env, this, fid_sss_sshd_pid);
+	pid = (*env)->GetStaticIntField(env, cl_simplesshdservice, fid_sss_sshd_pid);
 	kill(pid, SIGKILL);
-	(*env)->SetIntField(env, this, fid_sss_sshd_pid, 0);
+	(*env)->SetStaticIntField(env, cl_simplesshdservice, fid_sss_sshd_pid, 0);
 }
diff --git a/src/org/galexander/sshd/SimpleSSHDService.java b/src/org/galexander/sshd/SimpleSSHDService.java
index bf30323..7ebac8d 100644
--- a/src/org/galexander/sshd/SimpleSSHDService.java
+++ b/src/org/galexander/sshd/SimpleSSHDService.java
@@ -5,7 +5,7 @@ import android.content.Intent;
 import android.os.IBinder;
 
 public class SimpleSSHDService extends Service {
-	public int sshd_pid = 0;
+	public static int sshd_pid = 0;
 
 	public int onStartCommand(Intent intent, int flags, int startId) {
 		if ((intent == null) ||
@@ -24,7 +24,7 @@ public class SimpleSSHDService extends Service {
 		return null;
 	}
 
-	public boolean is_started() {
+	public static boolean is_started() {
 		return (sshd_pid != 0);
 	}