diff --git a/dram/src/error/flip_memory.cpp b/dram/src/error/flip_memory.cpp
index c6cb7e17..adeeb580 100644
--- a/dram/src/error/flip_memory.cpp
+++ b/dram/src/error/flip_memory.cpp
@@ -19,7 +19,6 @@
 
 
 using namespace std;
-using namespace core;
 
 void flip_memory::setBank(unsigned int b)
 {
diff --git a/dram/src/error/flip_memory.h b/dram/src/error/flip_memory.h
index 2ef22e7b..aeaea0af 100644
--- a/dram/src/error/flip_memory.h
+++ b/dram/src/error/flip_memory.h
@@ -16,7 +16,6 @@
 
 using namespace tlm;
 using namespace std;
-using namespace core;
 
 class flip_memory
 {