diff --git a/internal/decoders/data_packet_chunk.go b/internal/decoders/data_packet_chunk.go
index 9e319e8..b516b20 100644
--- a/internal/decoders/data_packet_chunk.go
+++ b/internal/decoders/data_packet_chunk.go
@@ -2,7 +2,7 @@ package decoders
 
 import (
 	"encoding/binary"
-	"log/slog"
+	"fmt"
 
 	"github.com/jwetzell/psn-go/internal/chunks"
 )
@@ -43,7 +43,7 @@ func DecodeDataPacketChunk(bytes []byte) (chunks.DataPacketChunk, error) {
 				}
 
 			default:
-				slog.Error("unhandled info packet id", "id", id)
+				return chunks.DataPacketChunk{}, fmt.Errorf("unknown data packet ID: 0x%04x", id)
 			}
 		}
 	}
diff --git a/internal/decoders/data_tracker_chunk.go b/internal/decoders/data_tracker_chunk.go
index c59c638..e57f606 100644
--- a/internal/decoders/data_tracker_chunk.go
+++ b/internal/decoders/data_tracker_chunk.go
@@ -2,7 +2,7 @@ package decoders
 
 import (
 	"encoding/binary"
-	"log/slog"
+	"fmt"
 
 	"github.com/jwetzell/psn-go/internal/chunks"
 )
@@ -93,7 +93,7 @@ func DecodeDataTrackerChunk(bytes []byte) (chunks.DataTrackerChunk, error) {
 				}
 			default:
 				offset = int(chunk.Header.DataLen)
-				slog.Error("unhandled data tracker packet chunk id", "id", id)
+				return chunks.DataTrackerChunk{}, fmt.Errorf("unknown data tracker chunk ID: 0x%04x", id)
 			}
 		}
 	}
diff --git a/internal/decoders/info_packet_chunk.go b/internal/decoders/info_packet_chunk.go
index 26ac06a..3db788c 100644
--- a/internal/decoders/info_packet_chunk.go
+++ b/internal/decoders/info_packet_chunk.go
@@ -2,7 +2,7 @@ package decoders
 
 import (
 	"encoding/binary"
-	"log/slog"
+	"fmt"
 
 	"github.com/jwetzell/psn-go/internal/chunks"
 )
@@ -51,7 +51,7 @@ func DecodeInfoPacketChunk(bytes []byte) (chunks.InfoPacketChunk, error) {
 				}
 
 			default:
-				slog.Error("unhandled info packet id", "id", id)
+				return chunks.InfoPacketChunk{}, fmt.Errorf("unknown info packet ID: 0x%04x", id)
 			}
 		}
 	}
diff --git a/internal/decoders/info_tracker_chunk.go b/internal/decoders/info_tracker_chunk.go
index b7ec965..fde8392 100644
--- a/internal/decoders/info_tracker_chunk.go
+++ b/internal/decoders/info_tracker_chunk.go
@@ -2,7 +2,7 @@ package decoders
 
 import (
 	"encoding/binary"
-	"log/slog"
+	"fmt"
 
 	"github.com/jwetzell/psn-go/internal/chunks"
 )
@@ -30,7 +30,7 @@ func DecodeInfoTrackerChunk(bytes []byte) (chunks.InfoTrackerChunk, error) {
 					offset = offset + int(tracker_name.Chunk.Header.DataLen)
 				}
 			default:
-				slog.Error("unhandled info tracker chunk id", "id", id)
+				return chunks.InfoTrackerChunk{}, fmt.Errorf("unknown info tracker chunk ID: 0x%04x", id)
 			}
 		}
 	}