diff --git a/Dockerfile b/Dockerfile
index 7bf8f5d..79d3af4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -37,7 +37,7 @@ RUN useradd -m -s /bin/bash -G users capcalc
 WORKDIR /home/capcalc
 ENV HOME="/home/capcalc"
 
-ENV IS_DOCKER_8395080871=1
+ENV IN_DOCKER_CONTAINER=1
 
 RUN ldconfig
 WORKDIR /tmp/
diff --git a/capcalc/scripts/capcalc_dispatcher b/capcalc/scripts/capcalc_dispatcher
index e02b609..01e5bc3 100755
--- a/capcalc/scripts/capcalc_dispatcher
+++ b/capcalc/scripts/capcalc_dispatcher
@@ -23,7 +23,7 @@ import sys
 
 def main():
     # get the command line parameters
-    if os.getenv("IS_DOCKER_8395080871") is not None:
+    if os.getenv("IN_DOCKER_CONTAINER") is not None:
         isdocker = True
         execdir = sys.path[0]
     else: