diff --git a/java/openjdk11/pkg-message b/java/openjdk11/pkg-message
index c3388e69a9e6..2ea3d87d89c8 100644
--- a/java/openjdk11/pkg-message
+++ b/java/openjdk11/pkg-message
@@ -1,15 +1,18 @@
 [
 { type: install
   message: <<EOM
-This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd
+This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd and
+procfs(5) mounted on /proc.
 
 If you have not done it yet, please do the following:
 
 	mount -t fdescfs fdesc /dev/fd
+	mount -t procfs proc /proc
 
 To make it permanent, you need the following lines in /etc/fstab:
 
 	fdesc	/dev/fd		fdescfs		rw	0	0
+	proc	/proc		procfs		rw	0	0
 EOM
 }
 ]
diff --git a/java/openjdk12/pkg-message b/java/openjdk12/pkg-message
index c3388e69a9e6..2ea3d87d89c8 100644
--- a/java/openjdk12/pkg-message
+++ b/java/openjdk12/pkg-message
@@ -1,15 +1,18 @@
 [
 { type: install
   message: <<EOM
-This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd
+This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd and
+procfs(5) mounted on /proc.
 
 If you have not done it yet, please do the following:
 
 	mount -t fdescfs fdesc /dev/fd
+	mount -t procfs proc /proc
 
 To make it permanent, you need the following lines in /etc/fstab:
 
 	fdesc	/dev/fd		fdescfs		rw	0	0
+	proc	/proc		procfs		rw	0	0
 EOM
 }
 ]
diff --git a/java/openjdk13/pkg-message b/java/openjdk13/pkg-message
index c3388e69a9e6..2ea3d87d89c8 100644
--- a/java/openjdk13/pkg-message
+++ b/java/openjdk13/pkg-message
@@ -1,15 +1,18 @@
 [
 { type: install
   message: <<EOM
-This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd
+This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd and
+procfs(5) mounted on /proc.
 
 If you have not done it yet, please do the following:
 
 	mount -t fdescfs fdesc /dev/fd
+	mount -t procfs proc /proc
 
 To make it permanent, you need the following lines in /etc/fstab:
 
 	fdesc	/dev/fd		fdescfs		rw	0	0
+	proc	/proc		procfs		rw	0	0
 EOM
 }
 ]
diff --git a/java/openjdk8/pkg-message b/java/openjdk8/pkg-message
index c3388e69a9e6..2ea3d87d89c8 100644
--- a/java/openjdk8/pkg-message
+++ b/java/openjdk8/pkg-message
@@ -1,15 +1,18 @@
 [
 { type: install
   message: <<EOM
-This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd
+This OpenJDK implementation requires fdescfs(5) mounted on /dev/fd and
+procfs(5) mounted on /proc.
 
 If you have not done it yet, please do the following:
 
 	mount -t fdescfs fdesc /dev/fd
+	mount -t procfs proc /proc
 
 To make it permanent, you need the following lines in /etc/fstab:
 
 	fdesc	/dev/fd		fdescfs		rw	0	0
+	proc	/proc		procfs		rw	0	0
 EOM
 }
 ]