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 1b9aa3e2a0..d8c44ff9c3 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
@@ -133,7 +133,7 @@ public class ConfigDefinition {
                     break;
                 case KEY_SIGNATURE:
                     signaturePrependFile = args[i + 1];
-                    state.addPrependNotInput(signaturePrependFile);
+                    state.addPostponedPrependNotInput(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 e44b9a543b..385241fc60 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
@@ -4,7 +4,6 @@ import com.rusefi.output.ConfigStructure;
 import com.rusefi.output.ConfigurationConsumer;
 
 import java.io.IOException;
-import java.util.List;
 import java.util.Map;
 
 public interface ReaderState {
@@ -22,7 +21,7 @@ public interface ReaderState {
 
     void addPrepend(String fileName);
 
-    void addPrependNotInput(String fileName);
+    void addPostponedPrependNotInput(String fileName);
 
     void addDestination(ConfigurationConsumer... consumers);
 
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 0fbc0c2e8b..6cd99e30bb 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
@@ -415,12 +415,12 @@ public class ReaderStateImpl implements ReaderState {
             // see LiveDataProcessor use-case with dynamic prepend usage
             return;
         }
+        variableRegistry.readPrependValues(fileName, false);
         inputFiles.add(fileName);
-        addPrependNotInput(fileName);
     }
 
     @Override
-    public void addPrependNotInput(String fileName) {
+    public void addPostponedPrependNotInput(String fileName) {
         prependFiles.add(fileName);
     }