diff --git a/src/logic/slbt_exec_ctx.c b/src/logic/slbt_exec_ctx.c
index 320314b..cc5e9b6 100644
--- a/src/logic/slbt_exec_ctx.c
+++ b/src/logic/slbt_exec_ctx.c
@@ -49,6 +49,7 @@ static char * slbt_source_file(char ** argv)
 					|| (!(strcmp(ch,"asm")))
 					|| (!(strcmp(ch,"c")))
 					|| (!(strcmp(ch,"cc")))
+					|| (!(strcmp(ch,"cpp")))
 					|| (!(strcmp(ch,"cxx"))))
 				return *parg;
 	return 0;