diff --git a/bind/einhorn.go b/bind/einhorn.go
index e695c0e..dc9aa38 100644
--- a/bind/einhorn.go
+++ b/bind/einhorn.go
@@ -1,4 +1,4 @@
-// +build !windows
+// +build !windows !appengine
 
 package bind
 
diff --git a/bind/einhorn_windows.go b/bind/einhorn_windows.go
index 093707f..18cd3b3 100644
--- a/bind/einhorn_windows.go
+++ b/bind/einhorn_windows.go
@@ -1,4 +1,4 @@
-// +build windows
+// +build windows appengine
 
 package bind
 
diff --git a/bind/systemd.go b/bind/systemd.go
index e7cd8e4..49d0013 100644
--- a/bind/systemd.go
+++ b/bind/systemd.go
@@ -1,4 +1,4 @@
-// +build !windows
+// +build !windows !appengine
 
 package bind
 
diff --git a/bind/systemd_windows.go b/bind/systemd_windows.go
index 4ad4d20..1ac1bad 100644
--- a/bind/systemd_windows.go
+++ b/bind/systemd_windows.go
@@ -1,4 +1,4 @@
-// +build windows
+// +build windows appengine
 
 package bind
 
diff --git a/graceful/einhorn.go b/graceful/einhorn.go
index 082d1c4..168f5b7 100644
--- a/graceful/einhorn.go
+++ b/graceful/einhorn.go
@@ -1,4 +1,4 @@
-// +build !windows
+// +build !windows !appengine
 
 package graceful