diff --git a/src/common/execio.c b/src/common/execio.c
--- a/src/common/execio.c
+++ b/src/common/execio.c
@@ -21,7 +21,9 @@
 
 #include <unistd.h>
 #include <sys/types.h>
+#ifndef _WIN32
 #include <sys/wait.h>
+#endif
 #include <signal.h>
 #include <malloc.h>
 #include <fcntl.h>
@@ -150,7 +152,11 @@ int _execio_checkpid(struct execio *eio)
 {
   int childstatus;
   
+#ifdef _WIN32
+  waitpid(eio->child, &childstatus, 0);
+#else
   waitpid(eio->child, &childstatus, WNOHANG);
+#endif
   /* perror()? */
 
   return WIFEXITED(childstatus);