diff --git a/py/emitcommon.c b/py/emitcommon.c
index 454ec9c5e5..62d8bd18a5 100644
--- a/py/emitcommon.c
+++ b/py/emitcommon.c
@@ -1,4 +1,4 @@
-#include <unistd.h>
+#include <string.h>
 #include <stdint.h>
 #include <assert.h>
 
diff --git a/py/stream.c b/py/stream.c
index 52e5f6d4b2..f3df70fa51 100644
--- a/py/stream.c
+++ b/py/stream.c
@@ -1,4 +1,4 @@
-#include <unistd.h>
+#include <string.h>
 
 #include "nlr.h"
 #include "misc.h"