diff --git a/java_tools/configuration_definition/src/main/java/com/rusefi/ConfigDefinition.java b/java_tools/configuration_definition/src/main/java/com/rusefi/ConfigDefinition.java
index 8d075b55c4..58fe6d1a7b 100644
--- a/java_tools/configuration_definition/src/main/java/com/rusefi/ConfigDefinition.java
+++ b/java_tools/configuration_definition/src/main/java/com/rusefi/ConfigDefinition.java
@@ -134,7 +134,7 @@ public class ConfigDefinition {
                     break;
                 case KEY_SIGNATURE:
                     signaturePrependFile = args[i + 1];
-                    state.getPrependFiles().add(args[i + 1]);
+                    state.addPrependNotInput(signaturePrependFile);
                     // don't add this file to the 'inputFiles'
                     break;
                 case KEY_SIGNATURE_DESTINATION:
diff --git a/java_tools/configuration_definition_base/src/main/java/com/rusefi/ReaderState.java b/java_tools/configuration_definition_base/src/main/java/com/rusefi/ReaderState.java
index 835419095f..e44b9a543b 100644
--- a/java_tools/configuration_definition_base/src/main/java/com/rusefi/ReaderState.java
+++ b/java_tools/configuration_definition_base/src/main/java/com/rusefi/ReaderState.java
@@ -22,6 +22,8 @@ public interface ReaderState {
 
     void addPrepend(String fileName);
 
+    void addPrependNotInput(String fileName);
+
     void addDestination(ConfigurationConsumer... consumers);
 
     VariableRegistry getVariableRegistry();
@@ -38,8 +40,6 @@ public interface ReaderState {
 
     void setTsFileOutputName(String tsFileOutputName);
 
-    List<String> getPrependFiles();
-
     boolean isStackEmpty();
 
     ConfigStructure peek();
diff --git a/java_tools/configuration_definition_base/src/main/java/com/rusefi/ReaderStateImpl.java b/java_tools/configuration_definition_base/src/main/java/com/rusefi/ReaderStateImpl.java
index c888dd3e26..1029ebd6ba 100644
--- a/java_tools/configuration_definition_base/src/main/java/com/rusefi/ReaderStateImpl.java
+++ b/java_tools/configuration_definition_base/src/main/java/com/rusefi/ReaderStateImpl.java
@@ -414,8 +414,13 @@ public class ReaderStateImpl implements ReaderState {
             // see LiveDataProcessor use-case with dynamic prepend usage
             return;
         }
-        prependFiles.add(fileName);
         inputFiles.add(fileName);
+        addPrependNotInput(fileName);
+    }
+
+    @Override
+    public void addPrependNotInput(String fileName) {
+        prependFiles.add(fileName);
     }
 
     @Override
@@ -462,11 +467,6 @@ public class ReaderStateImpl implements ReaderState {
         this.tsFileOutputName = tsFileOutputName;
     }
 
-    @Override
-    public List<String> getPrependFiles() {
-        return prependFiles;
-    }
-
     @Override
     public boolean isStackEmpty() {
         return stack.isEmpty();