diff --git a/Makefile.in b/Makefile.in
index 5d633a7..f5fd37f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -22,7 +22,7 @@ datarootdir=@datarootdir@
 localedir=@localedir@
 gettext_package=@GETTEXT_PACKAGE@
 
-CFLAGS=@CFLAGS@ @PURPLE_CFLAGS@ @DEFS@ -DENABLE_NLS -DLOCALEDIR='"$(localedir)"' -Wall -Wextra -Wno-deprecated-declarations -Wno-unused-parameter -I${srcdir} -I. -fno-strict-aliasing -fPIC
+CFLAGS=@CFLAGS@ @PURPLE_CFLAGS@ @DEFS@ -DENABLE_NLS -DLOCALEDIR='"$(localedir)"' -Wall -Wextra -Wno-deprecated-declarations -Wno-unused-parameter -I${srcdir} -I. -fno-strict-aliasing -fPIC -fstack-protector-strong -D_FORTIFY_SOURCE=2
 LDFLAGS=@LDFLAGS@ @OPENSSL_LIBS@ @PURPLE_LIBS@ @LIBS@ -rdynamic -ggdb
 DIR_PERM=0755
 FILE_PERM=0644