diff --git a/libguile/gc_os_dep.c b/libguile/gc_os_dep.c
index 085f9eb74..5dd82c519 100644
--- a/libguile/gc_os_dep.c
+++ b/libguile/gc_os_dep.c
@@ -221,7 +221,7 @@ 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