diff --git a/compiler/cheaders.v b/compiler/cheaders.v
index 33187c3b04..d4d7b723f4 100644
--- a/compiler/cheaders.v
+++ b/compiler/cheaders.v
@@ -38,6 +38,11 @@ CommonCHeaders = '
 #include <sys/wait.h> // os__wait uses wait on nix
 #endif
 
+#ifdef __FreeBSD__
+#include <sys/types.h>
+#include <sys/wait.h> // os__wait uses wait on nix
+#endif
+
 #define EMPTY_STRUCT_DECLARATION
 #define EMPTY_STRUCT_INITIALIZATION 0
 // Due to a tcc bug, the length of an array needs to be specified, but GCC crashes if it is...