diff --git a/tests/libprojectM/PCMTest.cpp b/tests/libprojectM/PCMTest.cpp
index af6cda340..7a7e83dd9 100644
--- a/tests/libprojectM/PCMTest.cpp
+++ b/tests/libprojectM/PCMTest.cpp
@@ -4,7 +4,7 @@
 
 #include <cmath>
 
-using libprojectM::Audio::PCM;
+using namespace libprojectM::Audio;
 
 class PcmMock : public PCM
 {