diff --git a/libs/vamp-plugins/TonalChangeDetect.cpp b/libs/vamp-plugins/TonalChangeDetect.cpp
index d391b44052..83235fd066 100644
--- a/libs/vamp-plugins/TonalChangeDetect.cpp
+++ b/libs/vamp-plugins/TonalChangeDetect.cpp
@@ -317,9 +317,9 @@ TonalChangeDetect::process(const float *const *inputBuffers,
                            Vamp::RealTime timestamp)
 {
     if (!m_chromagram) {
-	cerr << "ERROR: TonalChangeDetect::process: "
-	     << "Chromagram has not been initialised"
-	     << endl;
+	std::cerr << "ERROR: TonalChangeDetect::process: "
+	          << "Chromagram has not been initialised"
+	          << endl;
 	return FeatureSet();
     }