diff --git a/sortix/x64/process.cpp b/sortix/x64/process.cpp
index 597f838a..33a92d1d 100644
--- a/sortix/x64/process.cpp
+++ b/sortix/x64/process.cpp
@@ -22,6 +22,8 @@
 
 *******************************************************************************/
 
+#include <sys/types.h>
+
 #include <stdint.h>
 #include <string.h>
 
diff --git a/sortix/x86/process.cpp b/sortix/x86/process.cpp
index 2725d488..a945ee03 100644
--- a/sortix/x86/process.cpp
+++ b/sortix/x86/process.cpp
@@ -22,6 +22,8 @@
 
 *******************************************************************************/
 
+#include <sys/types.h>
+
 #include <stdint.h>
 #include <string.h>