diff --git a/src/bun.js/api/JSBundler.zig b/src/bun.js/api/JSBundler.zig
index 4ae467d3f5..34f7df0c9d 100644
--- a/src/bun.js/api/JSBundler.zig
+++ b/src/bun.js/api/JSBundler.zig
@@ -332,6 +332,14 @@ pub const JSBundler = struct {
                 try this.footer.appendSliceExact(slice.slice());
             }
 
+            if (try config.getOptional(globalThis, "globalName", ZigString.Slice)) |slice| {
+                defer slice.deinit();
+                try this.global_name.appendSliceExact(slice.slice());
+            } else if (try config.getOptional(globalThis, "global_name", ZigString.Slice)) |slice| {
+                defer slice.deinit();
+                try this.global_name.appendSliceExact(slice.slice());
+            }
+
             if (try config.getTruthy(globalThis, "sourcemap")) |source_map_js| {
                 if (source_map_js.isBoolean()) {
                     if (source_map_js == .true) {
@@ -722,6 +730,7 @@ pub const JSBundler = struct {
             self.conditions.deinit();
             self.drop.deinit();
             self.banner.deinit();
+            self.global_name.deinit();
             if (self.compile) |*compile| {
                 compile.deinit();
             }
diff --git a/src/cli/Arguments.zig b/src/cli/Arguments.zig
index bcfdec2d3b..ad1ea7e326 100644
--- a/src/cli/Arguments.zig
+++ b/src/cli/Arguments.zig
@@ -1024,6 +1024,18 @@ pub fn parse(allocator: std.mem.Allocator, ctx: Command.Context, comptime cmd: C
         }
 
         if (args.option("--global-name")) |global_name| {
+            // --global-name is only valid with --format=iife
+            if (ctx.bundler_options.output_format != .iife) {
+                Output.errGeneric("--global-name can only be used with --format=iife", .{});
+                Global.exit(1);
+            }
+            
+            // Validate that the provided name is a valid JavaScript identifier
+            if (!bun.js_lexer.isIdentifier(global_name)) {
+                Output.errGeneric("--global-name must be a valid JavaScript identifier, got: {s}", .{global_name});
+                Global.exit(1);
+            }
+            
             ctx.bundler_options.global_name = global_name;
         }