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-rw-r--r--hurd/hurd/signal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/hurd/hurd/signal.h b/hurd/hurd/signal.h
index c5b04f434c..39fa0f857c 100644
--- a/hurd/hurd/signal.h
+++ b/hurd/hurd/signal.h
@@ -26,6 +26,7 @@
 #error "Must have `_GNU_SOURCE' feature test macro to use this file"
 #endif
 
+#define __need_size_t
 #define __need_NULL
 #include <stddef.h>