diff --git a/src/boot/categories.toml b/src/boot/categories.toml
index ac571ca148c..6ac09383142 100644
--- a/src/boot/categories.toml
+++ b/src/boot/categories.toml
@@ -429,6 +429,12 @@ description = """
 Ways to view data, such as plotting or graphing.\
 """
 
+[wasm]
+name = "WebAssembly"
+description = """
+Crates for use when targeting WebAssembly, or for manipulating WebAssembly.\
+"""
+
 [web-programming]
 name = "Web programming"
 description = """