diff --git a/configure.ac b/configure.ac
index 6fc0f399b..04e80bf39 100644
--- a/configure.ac
+++ b/configure.ac
@@ -447,7 +447,10 @@ AC_SUBST([ENABLED_LINUXKM_PIE])
 
 if test "$ENABLED_LINUXKM_DEFAULTS" = "yes"
 then
-    AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_DH_CONST -DWOLFSSL_SP_MOD_WORD_RP -DWOLFSSL_OLD_PRIME_CHECK -DWOLFSSL_SP_DIV_64 -DWOLFSSL_SP_DIV_WORD_HALF -DWOLFSSL_SMALL_STACK_STATIC -DWOLFSSL_TEST_SUBROUTINE=static"
+    AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_DH_CONST -DWOLFSSL_SP_MOD_WORD_RP -DWOLFSSL_SP_DIV_64 -DWOLFSSL_SP_DIV_WORD_HALF -DWOLFSSL_SMALL_STACK_STATIC -DWOLFSSL_TEST_SUBROUTINE=static"
+    if test "$ENABLED_FIPS" = "no"; then
+        AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_OLD_PRIME_CHECK"
+    fi
 fi
 
 AC_ARG_WITH([linux-source],