diff --git a/package_physicsextensions.sh b/package_physicsextensions.sh
index 9260dd03ce1395bd2f50be33f01dd8004fbfddf5..5b4c23ecc9f338ad3778e6216b74c07e9177bc27 100755
--- a/package_physicsextensions.sh
+++ b/package_physicsextensions.sh
@@ -34,6 +34,12 @@ do
 	mkdir -p $dstIncludeDir
 	headers="$source/$project/*.h"
 	cp $headers "$dstIncludeDir"
+	headers="$source/$project/*.inl"
+	# not all projects have .inl files
+	files=$(ls $headers 2> /dev/null | wc -l)
+	if [ "$files" != "0" ] ; then
+	    cp $headers "$dstIncludeDir"
+	fi
 done
 	
 # Copy the license files into place for packaging