diff --git a/EdkCompatibilityPkg/EdkCompatibilityPkg.dsc b/EdkCompatibilityPkg/EdkCompatibilityPkg.dsc
index c54e4673c8..5677c8fa34 100644
--- a/EdkCompatibilityPkg/EdkCompatibilityPkg.dsc
+++ b/EdkCompatibilityPkg/EdkCompatibilityPkg.dsc
@@ -45,6 +45,11 @@
   *_*_*_VFRPP_FLAGS = /D EFI_SPECIFICATION_VERSION=0x0002000A /D PI_SPECIFICATION_VERSION=0x00010000 /D TIANO_RELEASE_VERSION=0x00080006 
   *_*_*_APP_FLAGS   = /D EFI_SPECIFICATION_VERSION=0x0002000A /D PI_SPECIFICATION_VERSION=0x00010000 /D TIANO_RELEASE_VERSION=0x00080006 
   *_*_*_PP_FLAGS    = /D EFI_SPECIFICATION_VERSION=0x0002000A /D PI_SPECIFICATION_VERSION=0x00010000 /D TIANO_RELEASE_VERSION=0x00080006 
+  *_UNIXGCC_*_CC_FLAGS    = -D EFI_SPECIFICATION_VERSION=0x0002000A -D PI_SPECIFICATION_VERSION=0x00010000 -D TIANO_RELEASE_VERSION=0x00080006 
+  *_UNIXGCC_*_ASM_FLAGS   =
+  *_UNIXGCC_*_VFRPP_FLAGS = -D EFI_SPECIFICATION_VERSION=0x0002000A -D PI_SPECIFICATION_VERSION=0x00010000 -D TIANO_RELEASE_VERSION=0x00080006 
+  *_UNIXGCC_*_APP_FLAGS   = -D EFI_SPECIFICATION_VERSION=0x0002000A -D PI_SPECIFICATION_VERSION=0x00010000 -D TIANO_RELEASE_VERSION=0x00080006 
+  *_UNIXGCC_*_PP_FLAGS    = -D EFI_SPECIFICATION_VERSION=0x0002000A -D PI_SPECIFICATION_VERSION=0x00010000 -D TIANO_RELEASE_VERSION=0x00080006 
 
 
 [Components.Common]