1 files changed, 2 insertions, 0 deletions
diff --git a/shape.c b/shape.c
index 6c158b2c8e..36d1adb7d9 100644
--- a/shape.c
+++ b/shape.c
@@ -777,7 +777,9 @@ rb_shape_find_by_id(VALUE mod, VALUE id)
 }
 #endif
 
+#ifdef HAVE_MMAP
 #include <sys/mman.h>
+#endif
 
 void
 Init_default_shapes(void)