diff --git a/libguile/gc_os_dep.c b/libguile/gc_os_dep.c
index 5dd82c519..51380d115 100644
--- a/libguile/gc_os_dep.c
+++ b/libguile/gc_os_dep.c
@@ -352,6 +352,10 @@ typedef int GC_bool;
 #   endif
 #   define mach_type_known
 # endif
+# if defined(__s390__) && defined(LINUX)
+#    define S370
+#    define mach_type_known
+# endif
 # if defined(__GNU__)
 #    define I386
 #    define GNU