diff --git a/function.c b/function.c
index 169c3a17..269c8ac8 100644
--- a/function.c
+++ b/function.c
@@ -1442,7 +1442,8 @@ fold_newlines (char *buffer, unsigned int *length, int trim_newlines)
 
 
 
-int shell_function_pid = 0, shell_function_completed;
+pid_t shell_function_pid = 0;
+int shell_function_completed;
 
 
 #ifdef WINDOWS32
diff --git a/job.c b/job.c
index 3baa5c78..3b02446e 100644
--- a/job.c
+++ b/job.c
@@ -563,7 +563,8 @@ child_handler (int sig UNUSED)
   */
 }
 
-extern int shell_function_pid, shell_function_completed;
+extern pid_t shell_function_pid;
+extern int shell_function_completed;
 
 /* Reap all dead children, storing the returned status and the new command
    state ('cs_finished') in the 'file' member of the 'struct child' for the