1 files changed, 1 insertions, 1 deletions
diff --git a/lzw.h b/lzw.h
index f1251f3..d02890f 100644
--- a/lzw.h
+++ b/lzw.h
@@ -48,7 +48,7 @@
 #include "zioP.h"
 
 #if defined _REENTRANT || defined _THREAD_SAFE
-# include <pthread.h>
+# include <signal.h>
 weak_symbol(pthread_sigmask);
 #endif