diff --git a/DataFormats/Detectors/FIT/FT0/include/DataFormatsFT0/ChannelData.h b/DataFormats/Detectors/FIT/FT0/include/DataFormatsFT0/ChannelData.h
index 9b3d6ec805604..dfe41525af480 100644
--- a/DataFormats/Detectors/FIT/FT0/include/DataFormatsFT0/ChannelData.h
+++ b/DataFormats/Detectors/FIT/FT0/include/DataFormatsFT0/ChannelData.h
@@ -76,8 +76,8 @@ struct ChannelData {
   void print() const;
   void printLog() const;
   [[nodiscard]] uint8_t getChannelID() const { return ChId; }
-  [[nodiscard]] uint16_t getTime() const { return CFDTime; }
-  [[nodiscard]] uint16_t getAmp() const { return QTCAmpl; }
+  [[nodiscard]] int16_t getTime() const { return CFDTime; }
+  [[nodiscard]] int16_t getAmp() const { return QTCAmpl; }
 
   bool operator==(ChannelData const& other) const
   {
diff --git a/DataFormats/Detectors/FIT/FV0/include/DataFormatsFV0/ChannelData.h b/DataFormats/Detectors/FIT/FV0/include/DataFormatsFV0/ChannelData.h
index 054b336510c4f..29447dfa04202 100644
--- a/DataFormats/Detectors/FIT/FV0/include/DataFormatsFV0/ChannelData.h
+++ b/DataFormats/Detectors/FIT/FV0/include/DataFormatsFV0/ChannelData.h
@@ -76,8 +76,8 @@ struct ChannelData {
   void print() const;
   void printLog() const;
   [[nodiscard]] uint8_t getChannelID() const { return ChId; }
-  [[nodiscard]] uint16_t getTime() const { return CFDTime; }
-  [[nodiscard]] uint16_t getAmp() const { return QTCAmpl; }
+  [[nodiscard]] int16_t getTime() const { return CFDTime; }
+  [[nodiscard]] int16_t getAmp() const { return QTCAmpl; }
 
   bool operator==(ChannelData const& other) const
   {