diff --git a/q/psutil/psutil.q b/q/psutil/psutil.q
index c00f9fd..eb9b19d 100644
--- a/q/psutil/psutil.q
+++ b/q/psutil/psutil.q
@@ -1,12 +1,12 @@
 // only implemented for linux
-if["l"<>first string .z.o;
+if[not(first string .z.o)in"l";
   '`nyi;
   ]
 
 .finos.dep.include"../util/util.q"
 
 ///
-// Get memory information about a process, possibly including USS, PSS and swap.
+// Get memory information about a process, possibly including USS, PSS, and swap.
 // @param x pid
 // @return A dictionary of memory information about the process.
 .finos.psutil.memory_full_info:{