diff --git a/Userland/Libraries/LibC/elf.h b/Userland/Libraries/LibC/elf.h
index 0d2ac66928..0edd9f6cd7 100644
--- a/Userland/Libraries/LibC/elf.h
+++ b/Userland/Libraries/LibC/elf.h
@@ -803,3 +803,4 @@ struct elf_args {
 #define R_X86_64_GLOB_DAT 6
 #define R_X86_64_JUMP_SLOT 7
 #define R_X86_64_RELATIVE 8
+#define R_X86_64_TPOFF64 18
diff --git a/Userland/Libraries/LibELF/DynamicLoader.cpp b/Userland/Libraries/LibELF/DynamicLoader.cpp
index 1871696e51..e471f941b3 100644
--- a/Userland/Libraries/LibELF/DynamicLoader.cpp
+++ b/Userland/Libraries/LibELF/DynamicLoader.cpp
@@ -486,6 +486,13 @@ DynamicLoader::RelocationResult DynamicLoader::do_relocation(const ELF::DynamicO
         *patch_ptr = negative_offset_from_tls_block_end(res.value().value, dynamic_object_of_symbol->tls_offset().value(), res.value().size);
         break;
     }
+#else
+    case R_X86_64_TPOFF64:
+        dbgln("FIXME: Patched R_X86_64_TPOFF64 relocation with invalid ptr.");
+        *patch_ptr = 0xaaaaaaaaaaaaaaaa;
+        break;
+#endif
+#ifndef __LP64__
     case R_386_JMP_SLOT: {
 #else
     case R_X86_64_JUMP_SLOT: {