diff --git a/firmware/boards/f1_dual/port.cpp b/firmware/boards/f1_dual/port.cpp
index b03df49..1857eaa 100644
--- a/firmware/boards/f1_dual/port.cpp
+++ b/firmware/boards/f1_dual/port.cpp
@@ -138,7 +138,7 @@ uint8_t *GetConfiguratiuonPtr()
     return (uint8_t *)&config;
 }
 
-int GetConfiguratiuonSize()
+size_t GetConfiguratiuonSize()
 {
     return sizeof(config);
 }
diff --git a/firmware/boards/f1_rev2/port.cpp b/firmware/boards/f1_rev2/port.cpp
index a1ae882..d5fd4a9 100644
--- a/firmware/boards/f1_rev2/port.cpp
+++ b/firmware/boards/f1_rev2/port.cpp
@@ -102,7 +102,7 @@ uint8_t *GetConfiguratiuonPtr()
     return (uint8_t *)&config;
 }
 
-int GetConfiguratiuonSize()
+size_t GetConfiguratiuonSize()
 {
     return sizeof(config);
 }
diff --git a/firmware/boards/f1_rev3/port.cpp b/firmware/boards/f1_rev3/port.cpp
index c47c7fc..a3f47e3 100644
--- a/firmware/boards/f1_rev3/port.cpp
+++ b/firmware/boards/f1_rev3/port.cpp
@@ -129,7 +129,7 @@ uint8_t *GetConfiguratiuonPtr()
     return (uint8_t *)&config;
 }
 
-int GetConfiguratiuonSize()
+size_t GetConfiguratiuonSize()
 {
     return sizeof(config);
 }
diff --git a/firmware/boards/port.h b/firmware/boards/port.h
index afcbdec..05f2069 100644
--- a/firmware/boards/port.h
+++ b/firmware/boards/port.h
@@ -39,12 +39,10 @@ public:
 };
 
 Configuration GetConfiguration();
-uint8_t *GetConfiguratiuonPtr();
-int GetConfiguratiuonSize();
 void SetConfiguration(const Configuration& newConfig);
 
 /* TS stuff */
-void SaveConfiguration();
 uint8_t *GetConfiguratiuonPtr();
-int GetConfiguratiuonSize();
+size_t GetConfiguratiuonSize();
+void SaveConfiguration();
 const char *getTsSignature();