diff --git a/BUILD.gn b/BUILD.gn
index 81f7d3133cf3c5dac92a07ccf38f00e12e58de1a..0050dcdcf9cda0b6c555bcff582386f0c549d56c 100755
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -18,6 +18,9 @@ config("cjson_config") {
     include_dirs = [
         ".",
     ]
+    ldflags = [
+      "-lm",
+    ]
 }
 
 cjson_sources = [