diff --git a/.cirrus.yml b/.cirrus.yml
index aaf4066366c..505c50f3285 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -664,7 +664,7 @@ task:
 
     # Use larger ccache cache, as this task compiles with multiple compilers /
     # flag combinations
-    CCACHE_MAXSIZE: "1GB"
+    CCACHE_MAXSIZE: "1G"
     CCACHE_DIR: "/tmp/ccache_dir"
 
     LINUX_CONFIGURE_FEATURES: *LINUX_CONFIGURE_FEATURES