diff --git a/Libraries/LibCore/System.cpp b/Libraries/LibCore/System.cpp
index de3aab10667..500e8eaec08 100644
--- a/Libraries/LibCore/System.cpp
+++ b/Libraries/LibCore/System.cpp
@@ -999,4 +999,9 @@ ErrorOr<void> set_resource_limits(int resource, rlim_t limit)
     return {};
 }
 
+int getpid()
+{
+    return ::getpid();
+}
+
 }
diff --git a/Libraries/LibCore/System.h b/Libraries/LibCore/System.h
index 0a6edcbff15..850e9324e8b 100644
--- a/Libraries/LibCore/System.h
+++ b/Libraries/LibCore/System.h
@@ -179,4 +179,6 @@ ErrorOr<rlimit> get_resource_limits(int resource);
 ErrorOr<void> set_resource_limits(int resource, rlim_t limit);
 #endif
 
+int getpid();
+
 }
diff --git a/Libraries/LibCore/SystemWindows.cpp b/Libraries/LibCore/SystemWindows.cpp
index a9f6165192f..8fe6f69021f 100644
--- a/Libraries/LibCore/SystemWindows.cpp
+++ b/Libraries/LibCore/SystemWindows.cpp
@@ -184,4 +184,9 @@ ErrorOr<void> munmap(void* address, size_t size)
     return {};
 }
 
+int getpid()
+{
+    return GetCurrentProcessId();
+}
+
 }