diff --git a/reference_guide/api_notable/api_notable_list_2020.md b/reference_guide/api_notable/api_notable_list_2020.md
index 26c17410c..13a3c849c 100644
--- a/reference_guide/api_notable/api_notable_list_2020.md
+++ b/reference_guide/api_notable/api_notable_list_2020.md
@@ -27,6 +27,9 @@ Specify incompatibility with Module
 Support for WebP images
 : The platform now bundles support for images in [WebP](https://en.wikipedia.org/wiki/WebP) format.
 
+FileType mapping via hashbang (`#!`)
+: Specify `hashBangs` attribute in `com.intellij.fileType` extension point. [Issue](https://youtrack.jetbrains.com/issue/IDEA-175757)
+
 # 2020.1 
 
 ## Notable Changes in IntelliJ Platform 2020.1