diff --git a/lib/portability.h b/lib/portability.h
index a2a1cd7..6e92361 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -286,6 +286,7 @@
 // stub it out for now.
 #ifdef __ANDROID_NDK__
 #define __android_log_write(a, b, c) (0)
+#define adjtime(x, y) (0)
 #endif
 
 #ifndef SYSLOG_NAMES