diff --git a/Libraries/LibCore/ProcessStatisticsReader.h b/Libraries/LibCore/ProcessStatisticsReader.h
index 6620365d08..3afcac4f60 100644
--- a/Libraries/LibCore/ProcessStatisticsReader.h
+++ b/Libraries/LibCore/ProcessStatisticsReader.h
@@ -57,9 +57,9 @@ struct ProcessStatistics {
     // Keep this in sync with /proc/all.
     // From the kernel side:
     pid_t pid;
-    unsigned pgid;
-    unsigned pgp;
-    unsigned sid;
+    pid_t pgid;
+    pid_t pgp;
+    pid_t sid;
     uid_t uid;
     gid_t gid;
     pid_t ppid;
diff --git a/Userland/top.cpp b/Userland/top.cpp
index 46c82d0479..41dffcd449 100644
--- a/Userland/top.cpp
+++ b/Userland/top.cpp
@@ -42,9 +42,9 @@
 struct ThreadData {
     int tid;
     pid_t pid;
-    unsigned pgid;
-    unsigned pgp;
-    unsigned sid;
+    pid_t pgid;
+    pid_t pgp;
+    pid_t sid;
     uid_t uid;
     gid_t gid;
     pid_t ppid;