diff --git a/CMakeLists.txt b/CMakeLists.txt
index ad707a2..d646cfb 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.11)
+cmake_minimum_required(VERSION 3.14)
 cmake_policy(SET CMP0077 NEW)
 # set the project name
 project(norm VERSION 1.5.8)
diff --git a/src/pynorm/core.py b/src/pynorm/core.py
index d9a32d7..933d89f 100755
--- a/src/pynorm/core.py
+++ b/src/pynorm/core.py
@@ -210,7 +210,7 @@ def get_libnorm():
     libnorm.NormSetReportInterval.argtypes = [ctypes.c_void_p, ctypes.c_double]
 
     libnorm.NormGetReportInterval.restype = ctypes.c_double
-    libnorm.NormGetReportInterval.argtypes = []
+    libnorm.NormGetReportInterval.argtypes = [ctypes.c_void_p]
 
     # Sender functions
     libnorm.NormStartSender.restype = ctypes.c_bool
diff --git a/src/pynorm/session.py b/src/pynorm/session.py
index c100277..02dee14 100755
--- a/src/pynorm/session.py
+++ b/src/pynorm/session.py
@@ -64,7 +64,7 @@ class Session(object):
         libnorm.NormSetLoopback(self, loop)
 
     def getReportInterval(self):
-        libnorm.NormGetReportInterval(self)
+        return libnorm.NormGetReportInterval(self)
 
     def setReportInterval(self, interval):
         libnorm.NormSetReportInterval(self, interval)