diff --git a/run-command.c b/run-command.c
index d4247d5fcc6..60c94198664 100644
--- a/run-command.c
+++ b/run-command.c
@@ -16,6 +16,7 @@
 #include "packfile.h"
 #include "hook.h"
 #include "compat/nonblock.h"
+#include "alloc.h"
 
 void child_process_init(struct child_process *child)
 {