diff --git a/libguile/gc_os_dep.c b/libguile/gc_os_dep.c
index dcd5a3152..1c82dc59d 100644
--- a/libguile/gc_os_dep.c
+++ b/libguile/gc_os_dep.c
@@ -238,7 +238,7 @@ typedef int GC_bool;
 #    define SPARC
 #    define mach_type_known
 # endif
-# if defined(LINUX) && defined(arm)
+# if defined(LINUX) && (defined(arm) || defined (__arm__))
 #    define ARM32
 #    define mach_type_known
 # endif