diff --git a/lib/krb5/Makefile.am b/lib/krb5/Makefile.am
index d3af28bc1..d478c17f4 100644
--- a/lib/krb5/Makefile.am
+++ b/lib/krb5/Makefile.am
@@ -4,6 +4,8 @@ AUTOMAKE_OPTIONS = no-dependencies foreign
 
 INCLUDES = -I$(top_builddir)/include
 
+CFLAGS=$(WFLAGS) @CFLAGS@
+
 lib_LIBRARIES = libkrb5.a
 
 libkrb5_a_SOURCES = \