diff --git a/js/src/jit/CompileInfo-inl.h b/js/src/jit/CompileInfo-inl.h
index 28fc409b2435..d45658cdc1e8 100644
--- a/js/src/jit/CompileInfo-inl.h
+++ b/js/src/jit/CompileInfo-inl.h
@@ -11,8 +11,8 @@
 
 #include "jsscriptinlines.h"
 
-using namespace js;
-using namespace jit;
+namespace js {
+namespace jit {
 
 inline RegExpObject *
 CompileInfo::getRegExp(jsbytecode *pc) const
@@ -26,4 +26,7 @@ CompileInfo::getFunction(jsbytecode *pc) const
     return script_->getFunction(GET_UINT32_INDEX(pc));
 }
 
+} // namespace jit
+} // namespace js
+
 #endif /* jit_CompileInfo_inl_h */