diff --git a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt
index 10e71cf..61ff046 100644
--- a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt
+++ b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt
@@ -5259,7 +5259,7 @@
                         is String -> currentValue.isBlank()
                         else -> false
                     }
-                    if (shouldInherit && value != null) {
+                    if (shouldInherit) {
                         // Only set non-empty values
                         when (value) {
                             is String -> if (value.isNotBlank()) textData.headerMetadata[key] = value
diff --git a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/formatters/KrillJsonGenerator.kt b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/formatters/KrillJsonGenerator.kt
index d5a7ca4..670bb64 100644
--- a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/formatters/KrillJsonGenerator.kt
+++ b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/formatters/KrillJsonGenerator.kt
@@ -108,7 +108,7 @@
                 is String -> currentValue.isBlank()
                 else -> false
             }
-            if (shouldInherit && value != null) {
+            if (shouldInherit) {
                 when (value) {
                     is String -> if (value.isNotBlank()) textData.headerMetadata[key] = value
                     is List<*> -> if (value.isNotEmpty()) textData.headerMetadata[key] = value
@@ -126,7 +126,7 @@
                 is String -> currentValue.isBlank()
                 else -> false
             }
-            if (shouldInherit && value != null) {
+            if (shouldInherit) {
                 when (value) {
                     is String -> if (value.isNotBlank()) textData.headerMetadata[key] = value
                     is List<*> -> if (value.isNotEmpty()) textData.headerMetadata[key] = value