diff --git a/make/autoconf/flags-cflags.m4 b/make/autoconf/flags-cflags.m4
index d3265855dd8..f90121af21f 100644
--- a/make/autoconf/flags-cflags.m4
+++ b/make/autoconf/flags-cflags.m4
@@ -23,6 +23,10 @@
 # questions.
 #
 
+# ===========================================================================
+# (c) Copyright IBM Corp. 2022, 2022 All Rights Reserved
+# ===========================================================================
+
 ################################################################################
 #
 # Setup flags for C/C++ compiler
@@ -528,10 +532,10 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_HELPER],
     fi
 
   elif test "x$TOOLCHAIN_TYPE" = xxlc; then
-    TOOLCHAIN_CFLAGS_JDK="-qchars=signed -qfullpath -qsaveopt"  # add on both CFLAGS
+    TOOLCHAIN_CFLAGS_JDK="-qchars=signed -qfullpath -qsaveopt -qstackprotect"  # add on both CFLAGS
     TOOLCHAIN_CFLAGS_JVM="-qtune=balanced \
         -qalias=noansi -qstrict -qtls=default -qlanglvl=c99vla \
-        -qlanglvl=noredefmac -qnortti -qnoeh -qignerrno"
+        -qlanglvl=noredefmac -qnortti -qnoeh -qignerrno -qstackprotect"
   elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
     TOOLCHAIN_CFLAGS_JVM="-nologo -MD -MP"
     TOOLCHAIN_CFLAGS_JDK="-nologo -MD -Zc:wchar_t-"