diff --git a/test_problems/cathermo/HMW_test_3/HMW_test_3.cpp b/test_problems/cathermo/HMW_test_3/HMW_test_3.cpp
index 04ae44eb4..e6d911e73 100644
--- a/test_problems/cathermo/HMW_test_3/HMW_test_3.cpp
+++ b/test_problems/cathermo/HMW_test_3/HMW_test_3.cpp
@@ -78,7 +78,7 @@ int main(int argc, char **argv)
      moll[1] += sum;
      
      HMW->setState_TPM(Temp, OneAtm, moll);
-#ifdef DEBUG_HKM
+#ifdef DEBUG_MODE
      HMW->m_debugCalc = true;
 #endif
      printf("       Temperature = %g K\n", Temp);
diff --git a/test_problems/cathermo/HMW_test_3/Makefile.in b/test_problems/cathermo/HMW_test_3/Makefile.in
index 879f11b0d..41322be6f 100644
--- a/test_problems/cathermo/HMW_test_3/Makefile.in
+++ b/test_problems/cathermo/HMW_test_3/Makefile.in
@@ -38,9 +38,9 @@ CXX = @CXX@
 
 # C++ compile flags
 ifeq ($(src_dir_tree), 1)
-CXX_FLAGS = -DSRCDIRTREE @CXXFLAGS@
+CXX_FLAGS = -DSRCDIRTREE @CXXFLAGS@ -DDEBUG_MODE
 else
-CXX_FLAGS = @CXXFLAGS@
+CXX_FLAGS = @CXXFLAGS@ -DDEBUG_MODE
 endif
 
 # Ending C++ linking libraries