diff --git a/math/eval/files/patch-Makefile b/math/eval/files/patch-Makefile
index 30b6cc197427..110d78ece8a2 100644
--- a/math/eval/files/patch-Makefile
+++ b/math/eval/files/patch-Makefile
@@ -5,7 +5,7 @@
  # trouble with any of the other source modules.
  #
 -CCFLAGS=-c
-+CCFLAGS=-c $(CFLAGS)
++CCFLAGS=-c $(CFLAGS) ${CPPFLAGS}
  #
  # On some systems, you can use LIBC=-lc_s to make the program smaller by
  # linking to a shared library.
@@ -21,7 +21,7 @@
  
  Eval$(EXE):  $(OBJFILES)
 -	$(CC) -o Eval $(OBJFILES) $(LIBM) $(LIBC)
-+	$(CC) -o Eval $(OBJFILES) $(LIBM) $(LIBC) $(LIBREADLINE)
++	$(CC) -o Eval $(OBJFILES) $(LIBM) $(LIBC) $(LIBREADLINE) ${LDFLAGS}
  	chmod 755 Eval
  
  eval:	Eval$(EXE)