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-rw-r--r--src/thread.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/thread.h b/src/thread.h
index d4cae360f68..64448007531 100644
--- a/src/thread.h
+++ b/src/thread.h
@@ -19,6 +19,7 @@ along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#ifndef THREAD_H
#define THREAD_H
+#include <sys/types.h> /* for ssize_t used by regex.h */
#include "regex.h"
#ifdef WINDOWSNT