diff --git a/src/chunk.zig b/src/chunk.zig
index abc54af..cbebaf1 100644
--- a/src/chunk.zig
+++ b/src/chunk.zig
@@ -220,13 +220,13 @@ pub const Chunk = struct {
         } else if (instruction == OpCode.Pop) {
             return try simpleInstruction(stdout, "OP_POP", index);
         } else if (instruction == OpCode.DefineGlobal) {
-            return try simpleInstruction(stdout, "OP_DEFGLOBAL", index);
+            return try constantInstruction(stdout, "OP_DEFGLOBAL", self, index);
         } else if (instruction == OpCode.DefineGlobalLong) {
-            return try simpleInstruction(stdout, "OP_DEFGLOBAL_LONG", index);
+            return try constantLongInstruction(stdout, "OP_DEFGLOBAL_LONG", self, index);
         } else if (instruction == OpCode.GetGlobal) {
-            return try simpleInstruction(stdout, "OP_GETGLOBAL", index);
+            return try constantInstruction(stdout, "OP_GETGLOBAL", self, index);
         } else if (instruction == OpCode.GetGlobalLong) {
-            return try simpleInstruction(stdout, "OP_GETGLOBAL_LONG", index);
+            return try constantLongInstruction(stdout, "OP_GETGLOBAL_LONG", self, index);
         } else {
             try stdout.print("Unknown opcode: {}\n", instruction);
             return index + 1;