diff --git a/Docs/src/generalpurpose.but b/Docs/src/generalpurpose.but
index e899a534..a6f7dd51 100644
--- a/Docs/src/generalpurpose.but
+++ b/Docs/src/generalpurpose.but
@@ -2,9 +2,9 @@
 
 \S2{callinstdll} CallInstDLL
 
-\c dllfile [/NOUNLOAD]
+\c dllfile [/NOUNLOAD] function_name
 
-Function Calls a NSIS extension DLL. See Contrib\\ExDLL for an example of how to make one. Extension DLLs can access the stack and variables. Use /NOUNLOAD to force the installer to leave the DLL loaded.
+Calls a function_name inside a NSIS extension DLL. See Contrib\\ExDLL for an example of how to make one. Extension DLLs can access the stack and variables. Use /NOUNLOAD to force the installer to leave the DLL loaded.
 
 \S2{copyfiles} CopyFiles