diff --git a/src/iperf_pthread.c b/src/iperf_pthread.c
index ea4918bcd..55ddd530f 100644
--- a/src/iperf_pthread.c
+++ b/src/iperf_pthread.c
@@ -6,19 +6,10 @@
  * as Android NDK does not support `pthread_cancel()`.
  */
 
+#include <string.h>
 #include <signal.h>
 #include "iperf_pthread.h"
 
-int pthread_setcanceltype(int type, int *oldtype) { return 0; }
-int pthread_setcancelstate(int state, int *oldstate) { return 0; }
-int pthread_cancel(pthread_t thread_id) {
-    int status;
-    if ((status = iperf_set_thread_exit_handler()) == 0) {
-        status = pthread_kill(thread_id, SIGUSR1);
-    }
-    return status;
-}
-
 void iperf_thread_exit_handler(int sig)
 { 
     pthread_exit(0);
@@ -37,4 +28,14 @@ int iperf_set_thread_exit_handler() {
     return rc;
 }
 
+int pthread_setcanceltype(int type, int *oldtype) { return 0; }
+int pthread_setcancelstate(int state, int *oldstate) { return 0; }
+int pthread_cancel(pthread_t thread_id) {
+    int status;
+    if ((status = iperf_set_thread_exit_handler()) == 0) {
+        status = pthread_kill(thread_id, SIGUSR1);
+    }
+    return status;
+}
+
 #endif // defined(HAVE_PTHREAD) && defined(__ANDROID__)
diff --git a/src/iperf_pthread.h b/src/iperf_pthread.h
index 44828d6a9..9fe3db8a2 100644
--- a/src/iperf_pthread.h
+++ b/src/iperf_pthread.h
@@ -10,7 +10,7 @@
  */
 
 #define PTHREAD_CANCEL_ASYNCHRONOUS 0
-#define PTHREAD_CANCEL_ENABLE NULL
+#define PTHREAD_CANCEL_ENABLE 0
 
 int pthread_setcanceltype(int type, int *oldtype);
 int pthread_setcancelstate(int state, int *oldstate);
@@ -18,4 +18,4 @@ int pthread_cancel(pthread_t thread_id);
 
 #endif // defined(__ANDROID__)
 
-#endif // defined(HAVE_PTHREAD)
\ No newline at end of file
+#endif // defined(HAVE_PTHREAD)