diff --git a/LibC/unistd.cpp b/LibC/unistd.cpp
index a31600c97b..22a4204b8f 100644
--- a/LibC/unistd.cpp
+++ b/LibC/unistd.cpp
@@ -480,4 +480,11 @@ void sysbeep()
     syscall(SC_beep);
 }
 
+int fsync(int fd)
+{
+    UNUSED_PARAM(fd);
+    dbgprintf("FIXME: Implement fsync()\n");
+    return 0;
+}
+
 }
diff --git a/LibC/unistd.h b/LibC/unistd.h
index c8cfa50086..a9cacca3a4 100644
--- a/LibC/unistd.h
+++ b/LibC/unistd.h
@@ -14,6 +14,7 @@ __BEGIN_DECLS
 
 extern char** environ;
 
+int fsync(int fd);
 void sysbeep();
 int systrace(pid_t);
 int gettid();