diff -ur ptlib-2.10.10.orig/make/ptbuildopts.mak.in ptlib-2.10.10/make/ptbuildopts.mak.in
--- ptlib-2.10.10.orig/make/ptbuildopts.mak.in	2014-08-04 18:11:02.000000000 +0000
+++ ptlib-2.10.10/make/ptbuildopts.mak.in	2014-08-04 18:11:32.000000000 +0000
@@ -15,8 +15,8 @@
 OSTYPE	   = @OSTYPE@
 OSRELEASE  = @OSRELEASE@
 
-STDCCFLAGS    += @STDCCFLAGS@ @CPPFLAGS@
-STDCXXFLAGS   += @STDCXXFLAGS@ @CPPFLAGS@
+STDCCFLAGS    += @STDCCFLAGS@ @CFLAGS@
+STDCXXFLAGS   += @STDCXXFLAGS@ @CXXFLAGS@
 OPTSTDCCFLAGS += @OPTSTDCCFLAGS@
 LDFLAGS	      += @LDFLAGS@
 ENDLDLIBS     += @ENDLDLIBS@