diff --git a/src/bundler/options.zig b/src/bundler/options.zig
index daea5ced59a3..b11d54112ee3 100644
--- a/src/bundler/options.zig
+++ b/src/bundler/options.zig
@@ -1087,9 +1087,9 @@ pub const ESMConditions = struct {
         var require_condition_map = ConditionsMap.init(allocator);
         var style_condition_map = ConditionsMap.init(allocator);
 
-        try default_condition_amp.ensureTotalCapacity(defaults.len + 2 + if (allow_addons) 1 else 0 + conditions.len);
-        try import_condition_map.ensureTotalCapacity(defaults.len + 2 + if (allow_addons) 1 else 0 + conditions.len);
-        try require_condition_map.ensureTotalCapacity(defaults.len + 2 + if (allow_addons) 1 else 0 + conditions.len);
+        try default_condition_amp.ensureTotalCapacity(defaults.len + 2 + @intFromBool(allow_addons) + conditions.len);
+        try import_condition_map.ensureTotalCapacity(defaults.len + 2 + @intFromBool(allow_addons) + conditions.len);
+        try require_condition_map.ensureTotalCapacity(defaults.len + 2 + @intFromBool(allow_addons) + conditions.len);
         try style_condition_map.ensureTotalCapacity(defaults.len + 2 + conditions.len);
 
         import_condition_map.putAssumeCapacity("import", {});
diff --git a/test/bundler/bun-build-api.test.ts b/test/bundler/bun-build-api.test.ts
index c1112743f02c..2187d789b95d 100644
--- a/test/bundler/bun-build-api.test.ts
+++ b/test/bundler/bun-build-api.test.ts
@@ -649,6 +649,17 @@ describe("Bun.build", () => {
       expect(await html?.text()).toContain("<meta name='injected-by-plugin' content='true'>");
     },
   );
+
+  test.concurrent("many conditions does not crash", async () => {
+    const dir = tempDirWithFiles("bun-build-api-many-conditions", {
+      "index.ts": "export const a = 1;",
+    });
+    const result = await Bun.build({
+      entrypoints: [join(dir, "index.ts")],
+      conditions: ["c1", "c2", "c3", "c4", "c5", "c6", "c7", "c8", "c9", "c10"],
+    });
+    expect(result.success).toBe(true);
+  });
 });
 
 test.concurrent("macro with nested object", async () => {