diff --git a/Userland/Libraries/LibJS/Bytecode/Block.cpp b/Userland/Libraries/LibJS/Bytecode/Block.cpp
index 28d042b21d..ef0add31a1 100644
--- a/Userland/Libraries/LibJS/Bytecode/Block.cpp
+++ b/Userland/Libraries/LibJS/Bytecode/Block.cpp
@@ -28,7 +28,6 @@ Block::Block()
 
 Block::~Block()
 {
-    unseal();
     Bytecode::InstructionStreamIterator it(instruction_stream());
     while (!it.at_end()) {
         auto& to_destroy = (*it);
@@ -39,20 +38,12 @@ Block::~Block()
     munmap(m_buffer, m_buffer_capacity);
 }
 
-void Block::seal() const
+void Block::seal()
 {
-    if (mprotect(m_buffer, m_buffer_capacity, PROT_READ) < 0) {
-        perror("ByteCode::Block::seal: mprotect");
-        VERIFY_NOT_REACHED();
-    }
-}
-
-void Block::unseal()
-{
-    if (mprotect(m_buffer, m_buffer_capacity, PROT_READ | PROT_WRITE) < 0) {
-        perror("ByteCode::Block::unseal: mprotect");
-        VERIFY_NOT_REACHED();
-    }
+    // FIXME: mprotect the instruction stream as PROT_READ
+    // This is currently not possible because instructions can have destructors (that clean up strings)
+    // Instructions should instead be destructor-less and refer to strings in a string table on the Bytecode::Block.
+    // It also doesn't work because instructions that have String members use RefPtr internally which must be in writable memory.
 }
 
 void Block::dump() const
diff --git a/Userland/Libraries/LibJS/Bytecode/Block.h b/Userland/Libraries/LibJS/Bytecode/Block.h
index 2c45cb2db5..4e81d2b1d3 100644
--- a/Userland/Libraries/LibJS/Bytecode/Block.h
+++ b/Userland/Libraries/LibJS/Bytecode/Block.h
@@ -42,8 +42,7 @@ public:
     static NonnullOwnPtr<Block> create();
     ~Block();
 
-    void seal() const;
-    void unseal();
+    void seal();
 
     void dump() const;
     ReadonlyBytes instruction_stream() const { return ReadonlyBytes { m_buffer, m_buffer_size }; }