diff --git a/source/sec_oss_what_it_is.ptx b/source/sec_oss_what_it_is.ptx
index 23ada8df..ac8905a7 100644
--- a/source/sec_oss_what_it_is.ptx
+++ b/source/sec_oss_what_it_is.ptx
@@ -4,7 +4,7 @@
   <title>What is Open Source Software?</title>
   <introduction>
 	<p>
-		Open Source Software (OSS) also sometimes referred to as Free and Open Source Software (FOSS) is distributed under a license that grants users the freedom to run, study, modify, and share the software and its source code with anyone, for any purpose. Note that the "free" in FOSS is related to these freedoms of what one is permitted to do with the the source code as opposed to being free of cost, which it might, or might not, be — more on this topic in the remainder of this chapter.
+		Open Source Software (OSS), also sometimes referred to as Free and Open Source Software (FOSS), is distributed under a license that grants users the freedom to run, study, modify, and share the software and its source code with anyone, for any purpose. Note that the "free" in FOSS is related to these freedoms of what one is permitted to do with the source code as opposed to being free of cost, which it might, or might not, be — more on this topic in the remainder of this chapter.
 	</p>
 
 	<p>