1 files changed, 2 insertions, 1 deletions

diff --git a/src/fns.c b/src/fns.c
index 5eab35a5646..40557923827 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -442,7 +442,8 @@ If string STR1 is greater, the value is a positive number N;
     || defined __i386__ || defined __i386       \
     || defined __arm64__ || defined __aarch64__ \
     || defined __powerpc__ || defined __powerpc \
-    || defined __ppc__ || defined __ppc
+    || defined __ppc__ || defined __ppc         \
+    || defined __s390__ || defined __s390x__
 #define HAVE_FAST_UNALIGNED_ACCESS 1
 #else
 #define HAVE_FAST_UNALIGNED_ACCESS 0