diff --git a/src/main/groovy/projects/dktk/v2/systemtherapie.groovy b/src/main/groovy/projects/dktk/v2/systemtherapie.groovy
index 2a92ce5c..94bd2bd8 100644
--- a/src/main/groovy/projects/dktk/v2/systemtherapie.groovy
+++ b/src/main/groovy/projects/dktk/v2/systemtherapie.groovy
@@ -83,7 +83,7 @@ medicationStatement {
         coding {
           // see http://fhir.org/guides/stats/codesystem-hl7.org.nz.fhir.ig.cca-sact-regimen-code.html
           system = "https://standards.digital.health.nz/ns/sact-regimen-code"
-          code = context.source[systemTherapy().protocolTypeDict()]
+          code = context.source[systemTherapy().protocolTypeDict()]?.getAt(CODE)?.toString()
         }
       }
     }