diff --git a/config/get_fltk b/config/get_fltk
index 87d0c1d..22f5bd8 100644
--- a/config/get_fltk
+++ b/config/get_fltk
@@ -2,13 +2,16 @@ if test -z "$with_fltk"; then
   with_fltk=yes
 fi
 
+cmd="FLTK_CXXFLAGS=\`fltk-config --cxxflags\`"
+. log_cmd
+
 cmd="FLTK_LIBS=\`fltk-config --ldflags\`"
 . log_cmd
 
 exe=$osname-$arch-fltk$$$exe_suff
 cxx=$CXX
 if test -z "$cxx"; then cxx=g++; fi;
-cmd="$cxx $CFLAGS $FLTK_LIBS -o $exe has_fltk.c"
+cmd="$cxx $CFLAGS $FLTK_CXXFLAGS $FLTK_LIBS -o $exe has_fltk.c"
 . log_cmd
 if test -r "$exe"; then
   echo "Using FLTK library"