diff --git a/ext/dramsim2/README b/ext/dramsim2/README
index f83e3f0bd3..7c5535d9ee 100644
--- a/ext/dramsim2/README
+++ b/ext/dramsim2/README
@@ -2,7 +2,7 @@ Follow these steps to get DRAMSim2 as part of gem5
 
 1. Download DRAMSim2
     1.1 Go to ext/dramsim2 (this directory)
-    1.2 Clone DRAMSim2: git clone git://github.com/dramninjasUMD/DRAMSim2.git
+    1.2 Clone DRAMSim2: git clone git@github.com:umd-memsys/DRAMSim2.git
 
 2. Compile gem5
     2.1 Business as usual
diff --git a/ext/dramsim2/SConscript b/ext/dramsim2/SConscript
index bc4c047063..869d220323 100644
--- a/ext/dramsim2/SConscript
+++ b/ext/dramsim2/SConscript
@@ -73,7 +73,7 @@ DRAMFile('Transaction.cpp')
 # DRAMSim2 violates some of the warning flags used by gem5, so
 # we explicitly disable them here
 dramenv = main.Clone()
-dramenv.Append(CCFLAGS=['-Wno-unused-value'])
+dramenv.Append(CCFLAGS=['-Wno-unused-value', '-Wno-error=nonnull-compare'])
 
 # If we are using clang, there are more flags to disable
 if main['CLANG']:
diff --git a/src/mem/DRAMSim2.py b/src/mem/DRAMSim2.py
index aa837295a6..bf5143ff68 100644
--- a/src/mem/DRAMSim2.py
+++ b/src/mem/DRAMSim2.py
@@ -34,7 +34,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 from m5.params import *
-from AbstractMemory import *
+from m5.objects.AbstractMemory import *
 
 # A wrapper for DRAMSim2 multi-channel memory controller
 class DRAMSim2(AbstractMemory):