diff --git a/src/libslic3r/PlaceholderParser.cpp b/src/libslic3r/PlaceholderParser.cpp
index 6f2b7f3eac..c4702aef26 100644
--- a/src/libslic3r/PlaceholderParser.cpp
+++ b/src/libslic3r/PlaceholderParser.cpp
@@ -1207,7 +1207,7 @@ namespace client
                                                                     [ px::bind(&expr<Iterator>::max, _val, _2) ]
                 |   (kw["random"] > '(' > conditional_expression(_r1) [_val = _1] > ',' > conditional_expression(_r1) > ')') 
                                                                     [ px::bind(&MyContext::random<Iterator>, _r1, _val, _2) ]
-                |   (kw["int"] > '(' > unary_expression(_r1) > ')') [ px::bind(&FactorActions::to_int,  _1,     _val) ]
+                |   (kw["int"] > '(' > conditional_expression(_r1) > ')') [ px::bind(&FactorActions::to_int,  _1,     _val) ]
                 |   (strict_double > iter_pos)                      [ px::bind(&FactorActions::double_, _1, _2, _val) ]
                 |   (int_      > iter_pos)                          [ px::bind(&FactorActions::int_,    _1, _2, _val) ]
                 |   (kw[bool_] > iter_pos)                          [ px::bind(&FactorActions::bool_,   _1, _2, _val) ]