diff --git a/src/core/chuck.cpp b/src/core/chuck.cpp
index a0a34b52b..3f40957f0 100644
--- a/src/core/chuck.cpp
+++ b/src/core/chuck.cpp
@@ -830,7 +830,7 @@ void ChucK::probeChugins()
     // ck files to pre load
     std::list<std::string> ck_libs_to_preload;
     // host verison
-    ostringstream ostr; ostr << CK_DLL_VERSION_MAJOR << "." << CK_DLL_VERSION_MINOR;
+    std::ostringstream ostr; ostr << CK_DLL_VERSION_MAJOR << "." << CK_DLL_VERSION_MINOR;
 
     // print whether chugins enabled
     EM_log( CK_LOG_SYSTEM, "chugin system: %s", getParamInt( CHUCK_PARAM_CHUGIN_ENABLE ) ? "ON" : "OFF" );