diff --git a/boswatch/inputSource/sdrInput.py b/boswatch/inputSource/sdrInput.py
index 803e658..940ad80 100644
--- a/boswatch/inputSource/sdrInput.py
+++ b/boswatch/inputSource/sdrInput.py
@@ -36,7 +36,7 @@ class SdrInput(InputBase):
             sdrProc.addArgument("-p " + str(sdrConfig.get("error", default="0")))      # frequency error in ppm
             sdrProc.addArgument("-l " + str(sdrConfig.get("squelch", default="1")))    # squelch
             sdrProc.addArgument("-g " + str(sdrConfig.get("gain", default="100")))     # gain
-            if (sdrConfig.get("fir_size") is not None):
+            if sdrConfig.get("fir_size", default=None):
                 sdrProc.addArgument("-F " + str(sdrConfig.get("fir_size")))            # fir_size
             sdrProc.addArgument("-M fm")                                               # set mode to fm
             sdrProc.addArgument("-E DC")                                               # set DC filter
diff --git a/docu/docs/changelog.md b/docu/docs/changelog.md
index a022d4b..6abd741 100644
--- a/docu/docs/changelog.md
+++ b/docu/docs/changelog.md
@@ -1,20 +1,6 @@
 # <center>Changelog</center>
 ---
 
-## Version [3.0.1] - date
-### Added
- * Divera24/7-Plugin
- * Python3-pip for requirements in install-script
- * Alsa-utils in install-script
- * Add fir_size for RTL-FM as optionally value
-### Changed
-### Deprecated
-### Removed
-### Fixed
- * Install-Script to use GIT in boswatch3-folder
- * Running RTL-FM Version (on RPi buster)
-### Security
-
 ## Version [2.9.0] - date
 
 Functions implemented in initial version: