diff --git a/debian/patches/0005-Set-debian-build-flags-during-build.patch b/debian/patches/0005-Set-debian-build-flags-during-build.patch
index d47986d..590c90f 100644
--- a/debian/patches/0005-Set-debian-build-flags-during-build.patch
+++ b/debian/patches/0005-Set-debian-build-flags-during-build.patch
@@ -16,7 +16,7 @@
  
  # Flags
 -CXXFLAGS		+= `cups-config --cflags` -Iinclude -Wall -I/opt/local/include
-+CXXFLAGS		+= $(shell dpkg-buildflags --get CXXFLAGS) `cups-config --cflags` -Iinclude -Wall -I/opt/local/include
++CXXFLAGS		+= $(shell dpkg-buildflags --get CXXFLAGS) $(shell dpkg-buildflags --get CPPFLAGS) `cups-config --cflags` -Iinclude -Wall -I/opt/local/include
  DEBUG_CXXFLAGS		+= -DDEBUG  -DDUMP_CACHE
  OPTIM_CXXFLAGS 		+= -g
 -rastertoqpdl_LDFLAGS	:= `cups-config --ldflags` -L/opt/local/lib