diff --git a/SDFTools/sdf/nodes/cpp/MFCC.h b/SDFTools/sdf/nodes/cpp/MFCC.h
index 8cb872d1..15ee1229 100755
--- a/SDFTools/sdf/nodes/cpp/MFCC.h
+++ b/SDFTools/sdf/nodes/cpp/MFCC.h
@@ -147,7 +147,7 @@ public:
     };
 
     const arm_mfcc_instance_q15 *mfccConfig;
-    std::vector<q15_t> memory;
+    std::vector<q31_t> memory;
 };
 
 
diff --git a/Scripts/mfccdata.py b/Scripts/mfccdata.py
index 69111d29..ed0a81be 100755
--- a/Scripts/mfccdata.py
+++ b/Scripts/mfccdata.py
@@ -237,6 +237,8 @@ def checkF16(configs):
     configs["hasF16"]=hasF16
 
 env = Environment(
+       # For 3.0 version of jinja2, replace with
+       # loader=PackageLoader("mfcctemplates",""),
        loader=PackageLoader("mfccdata","mfcctemplates"),
        autoescape=select_autoescape(),
        trim_blocks=True