diff --git a/src/utils/symbindex.pysty3 b/src/utils/symbindex.pysty3
index e0525da..8aefea5 100644
--- a/src/utils/symbindex.pysty3
+++ b/src/utils/symbindex.pysty3
@@ -33,7 +33,6 @@ __HEADER__(Declaring of math symbols with automatic indexing)
     \bool_new:c { used_#2 }
     \cs_new_protected:cn { symbol_#2: }
       {
-        #4{#5}
         \bool_if:cF { used_#2 }
         {
           \index[#1]
@@ -45,6 +44,7 @@ __HEADER__(Declaring of math symbols with automatic indexing)
             }
           \bool_gset_true:c { used_#2 }
         }
+        #4{#5}
       }
     \expandafter\protected\expandafter\gdef\csname#2\endcsname
       {