diff --git a/vlib/compiler/cheaders.v b/vlib/compiler/cheaders.v
index 2246bbf86a..6d93c8b784 100644
--- a/vlib/compiler/cheaders.v
+++ b/vlib/compiler/cheaders.v
@@ -106,6 +106,11 @@ extern char **environ;
 #include <sys/wait.h> // os__wait uses wait on nix
 #endif
 
+#ifdef __sun
+#include <sys/types.h>
+#include <sys/wait.h> // os__wait uses wait on nix
+#endif
+
 $c_common_macros
 
 #ifdef _WIN32
diff --git a/vlib/v/gen/cheaders.v b/vlib/v/gen/cheaders.v
index 9d2a820bea..1d9f4e81c4 100644
--- a/vlib/v/gen/cheaders.v
+++ b/vlib/v/gen/cheaders.v
@@ -107,6 +107,11 @@ extern char **environ;
 #include <sys/wait.h> // os__wait uses wait on nix
 #endif
 
+#ifdef __sun
+#include <sys/types.h>
+#include <sys/wait.h> // os__wait uses wait on nix
+#endif
+
 $c_common_macros
 
 #ifdef _WIN32