diff --git a/core/smn_commandline.cpp b/core/smn_commandline.cpp
index 570d6474e..890db1212 100644
--- a/core/smn_commandline.cpp
+++ b/core/smn_commandline.cpp
@@ -64,7 +64,7 @@ static cell_t sm_GetCommandLineParam(IPluginContext *pCtx, const cell_t *params)
 	char *param = NULL;
 	char *defValue = NULL;
 	pCtx->LocalToString(params[1], &param);
-	pCtx->LocalToString(params[4], &param);
+	pCtx->LocalToString(params[4], &defValue);
 
 	const char *value = pCmdLine->ParmValue(param, defValue);