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-rw-r--r--src/lib/netlist/plib/pfunction.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/netlist/plib/pfunction.cpp b/src/lib/netlist/plib/pfunction.cpp
index 0f48860d15b..7113a6e07fb 100644
--- a/src/lib/netlist/plib/pfunction.cpp
+++ b/src/lib/netlist/plib/pfunction.cpp
@@ -86,7 +86,7 @@ static int get_prio(pstring v)
{
if (v == "(" || v == ")")
return 1;
- else if (v.left(v.begin()+1) >= "a" && v.left(v.begin()+1) <= "z")
+ else if (v.left(std::next(v.begin(),1)) >= "a" && v.left(std::next(v.begin(),1)) <= "z")
return 0;
else if (v == "*" || v == "/")
return 20;