diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 45f61f4ce..c3ee6f050 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -188,7 +188,7 @@ void printHf14aConfig(void) {
  * @brief setSamplingConfig
  * @param sc
  */
-void setHf14aConfig(hf14a_config *hc) {
+void setHf14aConfig(const hf14a_config *hc) {
 
     if ((hc->forceanticol >= 0) && (hc->forceanticol <= 2))
         hf14aconfig.forceanticol = hc->forceanticol;
@@ -564,7 +564,7 @@ RAMFUNC int ManchesterDecoding(uint8_t bit, uint16_t offset, uint32_t non_real_t
 }
 
 
-// Thinfilm, Kovio mangels ISO14443A in the way that they don't use start bit nor parity bits.
+// Thinfilm, Kovio mangles ISO14443A in the way that they don't use start bit nor parity bits.
 static RAMFUNC int ManchesterDecoding_Thinfilm(uint8_t bit) {
     Demod.twoBits = (Demod.twoBits << 8) | bit;
 
diff --git a/armsrc/iso14443a.h b/armsrc/iso14443a.h
index a6f68067b..7957e6f48 100644
--- a/armsrc/iso14443a.h
+++ b/armsrc/iso14443a.h
@@ -121,7 +121,7 @@ typedef enum {
 #endif
 
 void printHf14aConfig(void);
-void setHf14aConfig(hf14a_config *hc);
+void setHf14aConfig(const hf14a_config *hc);
 hf14a_config *getHf14aConfig(void);
 void iso14a_set_timeout(uint32_t timeout);
 uint32_t iso14a_get_timeout(void);