diff --git a/fpga/generator/insert_debug_comment.sh b/fpga/generator/insert_debug_comment.sh
index 35fa05a02..b9f8c86f8 100755
--- a/fpga/generator/insert_debug_comment.sh
+++ b/fpga/generator/insert_debug_comment.sh
@@ -2,9 +2,9 @@
 ###########################################
 ## insert_debug_comment.sh
 ##
-## Written: Ross Thompson ross1728@gmail.com
+## Written: Rose Thompson ross1728@gmail.com
 ## Created: 20 January 2023
-## Modified: 20 January 2023
+## Modified: 16 April 2024
 ##
 ## A component of the CORE-V-WALLY configurable RISC-V project.
 ## https://github.com/openhwgroup/cvw
@@ -29,11 +29,21 @@
 # Then it processes them to add mark_debug on signals needed by the FPGA's ILA.
 copiedDir="../src/CopiedFiles_do_not_add_to_repo"
 while read line; do
-    readarray -d ":" -t StrArray <<< "$line"
-    file="${copiedDir}/${StrArray[0]}"
-    signal=`echo "${StrArray[1]}" | awk '{$1=$1};1'`
+    # older versions of bash are incompatible with readarray -d :(
+    #readarray -d ":" -t StrArray <<< "$line"
+    #file="${copiedDir}/${StrArray[0]}"
+    #signal=`echo "${StrArray[1]}" | awk '{$1=$1};1'`
+    fileName=`echo $line | cut -d  ":" -f 1`
+    file=${copiedDir}/$fileName
+    signal=`echo $line | cut -d  ":" -f 2`
+    echo $file
+    echo $signal
     readarray -d " " -t SigArray <<< $signal
-    sigType=`echo "${SigArray[0]}" | awk '{$1=$1};1'`
-    sigName=`echo "${SigArray[1]}" | awk '{$1=$1};1'`
+    sigType=`echo $signal | cut -d " " -f 1`
+    sigType=`echo $sigType | awk '{$1=$1};1'`
+    sigName=`echo $signal | cut -d " " -f 2`
+    sigName=`echo $sigName | awk '{$1=$1};1'`
+    #sigType=`echo "${SigArray[0]}" | awk '{$1=$1};1'`
+    #sigName=`echo "${SigArray[1]}" | awk '{$1=$1};1'`
     find $copiedDir -wholename $file | xargs sed -i "s/\(.*${sigType}.*${sigName}\)/(\* mark_debug = \"true\" \*)\1/g" 
 done < ../constraints/marked_debug.txt