diff --git a/avdd b/avdd
index 92514f6..f5ace18 100755
--- a/avdd
+++ b/avdd
@@ -44,7 +44,7 @@ DEFAULT_SEP_L='| '
 DEFAULT_SEP_R=' '
 DEFAULT_SUF=' '
 MOD_DIR="$(dirname "$0")"/mod
-FIFO=/tmp/avdd-fifo-"$("$(dirname "$0")"/rpid $$)"
+FIFO=/tmp/avdd-fifo-"$("$(dirname "$0")"/rpid)"
 
 mod_list="${1-${DEFAULT_MOD_LIST}}"
 
diff --git a/avds b/avds
index de66324..aaca1ca 100755
--- a/avds
+++ b/avds
@@ -44,7 +44,7 @@ EXAMPLES:
                 avds 'bat,dt' m true
 "
 DAEMON=avdd
-FIFO=/tmp/"${DAEMON}"-fifo-"$("$(dirname "$0")"/rpid $$)"
+FIFO=/tmp/"${DAEMON}"-fifo-"$("$(dirname "$0")"/rpid)"
 
 # Convert integer milliseconds to floating point seconds
 ms_to_s () {