diff --git a/processor/src/main/java/org/mapstruct/ap/MapperGenerationVisitor.java b/processor/src/main/java/org/mapstruct/ap/MapperGenerationVisitor.java
index deea4b9cd..ef7ad7265 100644
--- a/processor/src/main/java/org/mapstruct/ap/MapperGenerationVisitor.java
+++ b/processor/src/main/java/org/mapstruct/ap/MapperGenerationVisitor.java
@@ -193,7 +193,7 @@ public class MapperGenerationVisitor extends ElementKindVisitor6<Void, Void> {
                             mappingMethod.getParameterName() + "." + property.getSourceReadAccessorName() + "()",
                             property.getTargetType()
                         ) : null,
-                        conversion != null ? conversion.from(
+                        conversion != null && reverseMappingMethod != null ? conversion.from(
                             reverseMappingMethod.getParameterName() + "." + property.getTargetReadAccessorName() + "()",
                             property.getSourceType()
                         ) : null