diff --git a/src/regexp.c b/src/regexp.c
index e6b75ea..2cbe64e 100644
--- a/src/regexp.c
+++ b/src/regexp.c
@@ -2023,7 +2023,7 @@
 
 	    // Although unlikely, it is possible that the expression invokes a
 	    // substitute command (it might fail, but still).  Therefore keep
-	    // an array if eval results.
+	    // an array of eval results.
 	    ++nesting;
 
 	    if (expr != NULL)