diff --git a/spec/v0.1.md b/spec/v0.1.md
index bb10f16..0b1a986 100644
--- a/spec/v0.1.md
+++ b/spec/v0.1.md
@@ -210,14 +210,6 @@ Full path:
 
 ### Blocking
 
-#### system(cmd)
-
-Executes a command, returns exit code.
-
-```fun
-system("ls -l")
-```
-
 #### exec(cmd)
 
 Executes a command, returns stdout.
@@ -226,9 +218,7 @@ Executes a command, returns stdout.
 string result = exec("date")
 ```
 
-### Non-Blocking
-
-#### nsystem(cmd)
+#### system(cmd)
 
 Executes a command, returns exit code.
 
@@ -236,6 +226,8 @@ Executes a command, returns exit code.
 system("ls -l")
 ```
 
+### Non-Blocking
+
 #### nexec(cmd)
 
 Executes a command, returns stdout.
@@ -252,6 +244,14 @@ Executes a command asynchronously, returns process ID.
 number pid = nspawn("sleep 10")
 ```
 
+#### nsystem(cmd)
+
+Executes a command, returns exit code.
+
+```fun
+system("ls -l")
+```
+
 ### Helpers
 
 #### wait(pid)