diff --git a/compiling_intro.md b/compiling_intro.md
index 5f8dbe2..f534a29 100644
--- a/compiling_intro.md
+++ b/compiling_intro.md
@@ -107,7 +107,7 @@ Target controls optimization and debug flags. Each mode means:
 scons platform=<platform> target=debug/release_debug/release
 ```
 
-This flag appends ".debug" suffix (for debug), or ".tools" (for debug with tools enable). When optimization is enabled (release) it appends the ".opt" suffix.
+This flag appends ".debug" suffix (for debug), or ".tools" (for debug with tools enables). When optimization is enabled (release) it appends the ".opt" suffix.
 
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