diff --git a/AK/Vector.h b/AK/Vector.h
index 2ed2dc7bfc..1ae11d6cab 100644
--- a/AK/Vector.h
+++ b/AK/Vector.h
@@ -3,7 +3,13 @@
 #include <AK/Assertions.h>
 #include <AK/StdLibExtras.h>
 #include <AK/kmalloc.h>
+
+// NOTE: We can't include <initializer_list> during the toolchain bootstrap,
+//       since it's part of libstdc++, and libstdc++ depends on LibC.
+//       For this reason, we don't support Vector(initializer_list) in LibC.
+#ifndef SERENITY_LIBC_BUILD
 #include <initializer_list>
+#endif
 
 #ifndef __serenity__
 #include <new>
@@ -65,12 +71,14 @@ public:
         clear();
     }
 
+#ifndef SERENITY_LIBC_BUILD
     Vector(std::initializer_list<T> list)
     {
         ensure_capacity(list.size());
         for (auto& item : list)
             unchecked_append(item);
     }
+#endif
 
     Vector(Vector&& other)
         : m_size(other.m_size)
diff --git a/LibC/Makefile b/LibC/Makefile
index 8892be807f..83b9e1944d 100644
--- a/LibC/Makefile
+++ b/LibC/Makefile
@@ -58,7 +58,7 @@ ASM_OBJS = setjmp.ao crti.ao crtn.ao
 CPP_OBJS = $(AK_OBJS) $(WIDGETS_OBJS) $(LIBC_OBJS)
 
 LIBRARY = libc.a
-DEFINES += -DUSERLAND
+DEFINES += -DUSERLAND -DSERENITY_LIBC_BUILD
 
 all: $(LIBRARY) startfiles