diff --git a/ShellPkg/ShellPkg.dec b/ShellPkg/ShellPkg.dec
index 4c7292b3b0..55e4fb702c 100644
--- a/ShellPkg/ShellPkg.dec
+++ b/ShellPkg/ShellPkg.dec
@@ -59,4 +59,9 @@
 [PcdsFixedAtBuild]
   ## This flag is used to control initialization of the shell library
   ## This should be FALSE for compiling the shell application itself only.
-  gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|TRUE|BOOLEAN|0x00000005
\ No newline at end of file
+  gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|TRUE|BOOLEAN|0x00000005
+
+  ## This is the max buffer for ShellLib printings.
+  gEfiShellPkgTokenSpaceGuid.PcdShellLibMaxPrintBufferSize|4000|UINT16|0x0000000C
+
+