diff --git a/Userland/Libraries/LibCrypto/PK/Code/EMSA_PSS.h b/Userland/Libraries/LibCrypto/PK/Code/EMSA_PSS.h
index 3193c772d4..d80ca5e6e9 100644
--- a/Userland/Libraries/LibCrypto/PK/Code/EMSA_PSS.h
+++ b/Userland/Libraries/LibCrypto/PK/Code/EMSA_PSS.h
@@ -9,6 +9,7 @@
 #include <AK/Array.h>
 #include <AK/Format.h>
 #include <AK/Random.h>
+#include <AK/Vector.h>
 #include <LibCrypto/PK/Code/Code.h>
 
 namespace Crypto {
diff --git a/Userland/Libraries/LibJS/Runtime/PropertyAttributes.h b/Userland/Libraries/LibJS/Runtime/PropertyAttributes.h
index 8af1a8a4cc..a31b0e048f 100644
--- a/Userland/Libraries/LibJS/Runtime/PropertyAttributes.h
+++ b/Userland/Libraries/LibJS/Runtime/PropertyAttributes.h
@@ -10,6 +10,7 @@
 #include <AK/Format.h>
 #include <AK/String.h>
 #include <AK/Types.h>
+#include <AK/Vector.h>
 
 namespace JS {
 
diff --git a/Userland/Libraries/LibPDF/Command.h b/Userland/Libraries/LibPDF/Command.h
index 967687d853..01f69aedc0 100644
--- a/Userland/Libraries/LibPDF/Command.h
+++ b/Userland/Libraries/LibPDF/Command.h
@@ -9,6 +9,7 @@
 #include <AK/Format.h>
 #include <AK/String.h>
 #include <AK/StringBuilder.h>
+#include <AK/Vector.h>
 #include <LibPDF/Value.h>
 
 #define ENUMERATE_COMMANDS(V)                                                            \
diff --git a/Userland/Libraries/LibPDF/Reader.h b/Userland/Libraries/LibPDF/Reader.h
index ba03af849c..d9ae301ac8 100644
--- a/Userland/Libraries/LibPDF/Reader.h
+++ b/Userland/Libraries/LibPDF/Reader.h
@@ -11,6 +11,7 @@
 #include <AK/ScopeGuard.h>
 #include <AK/Span.h>
 #include <AK/String.h>
+#include <AK/Vector.h>
 
 namespace PDF {
 
diff --git a/Userland/Libraries/LibPDF/XRefTable.h b/Userland/Libraries/LibPDF/XRefTable.h
index e6b7a490ca..5ac0cd355f 100644
--- a/Userland/Libraries/LibPDF/XRefTable.h
+++ b/Userland/Libraries/LibPDF/XRefTable.h
@@ -9,6 +9,7 @@
 #include <AK/Format.h>
 #include <AK/RefCounted.h>
 #include <AK/String.h>
+#include <AK/Vector.h>
 
 namespace PDF {