diff --git a/performance.md b/performance.md
index 2ffa35d..65f0e85 100644
--- a/performance.md
+++ b/performance.md
@@ -1227,7 +1227,7 @@ different tradeoffs that were reasonable in the 70s or 80s but don't
 necessarily apply to your use case. For example, what they determine to be
 "reasonable" memory vs. disk usage tradeoffs. Memory sizes are now orders of
 magnitude larger, and SSDs have altered the latency penalty for using disk.
-Simiarly, some streaming algorithms are designed for router hardware, which
+Similarly, some streaming algorithms are designed for router hardware, which
 can make it a pain to translate into software.
 
 Make sure the assumptions the algorithm makes about your data hold.