diff --git a/src/engine/engine_util_blas.h b/src/engine/engine_util_blas.h
index dfaccbe6..2b82cb54 100644
--- a/src/engine/engine_util_blas.h
+++ b/src/engine/engine_util_blas.h
@@ -24,7 +24,7 @@
 extern "C" {
 #endif
 
-//------------------------------ standard library fuctions -----------------------------------------
+//------------------------------ standard library functions ----------------------------------------
 
 #ifdef mjUSEDOUBLE
   #define mju_sqrt    sqrt