diff --git a/lib/filefct.sh b/lib/filefct.sh
index a0de421..123ff53 100644
--- a/lib/filefct.sh
+++ b/lib/filefct.sh
@@ -143,6 +143,7 @@ appendfile()
         die 12
     fi
 }
+export -f appendfile
 
 
 # ------------------------------------------------------------------------------
@@ -165,6 +166,7 @@ isdirempty()
     fi
     return 1
 }
+export -f isdirempty
 
 
 # ------------------------------------------------------------------------------
@@ -210,6 +212,7 @@ patchfile()
 
     unset rights dstfile
 }
+export -f patchfile
 
 
 # ------------------------------------------------------------------------------
@@ -226,6 +229,7 @@ tagfile()
         fi
     done
 }
+export -f tagfile
 
 
 # ------------------------------------------------------------------------------
@@ -240,5 +244,6 @@ file_exists()
        fi
     done
 }
+export -f file_exists
 
 # EOF