diff --git a/blis-s390x.patch b/blis-s390x.patch
new file mode 100644
index 0000000..73c5136
--- /dev/null
+++ b/blis-s390x.patch
@@ -0,0 +1,17 @@
+--- blis-0.7.0/frame/include/bli_system.h~	2020-04-07 19:41:44.000000000 +0000
++++ blis-0.7.0/frame/include/bli_system.h	2020-07-01 08:27:54.202529712 +0000
+@@ -62,8 +62,10 @@
+ #endif
+ 
+ // Determine if we are on a 64-bit or 32-bit architecture.
+-#if defined(_M_X64) || defined(__x86_64) || defined(__aarch64__) || \
+-    defined(_ARCH_PPC64)
++// Current 64-bit Unix systems probably define _LP64; there are
++// potentially better macros for GCC.
++#if _LP64 || defined(_M_X64) || defined(__x86_64) || defined(__aarch64__) || \
++    defined(_ARCH_PPC64) || defined(__s390x__)
+   #define BLIS_ARCH_64
+ #else
+   #define BLIS_ARCH_32
+
+