diff --git a/openrtx/include/interfaces/cps_io.h b/openrtx/include/interfaces/cps_io.h
index 735d91f1..05b5ce56 100644
--- a/openrtx/include/interfaces/cps_io.h
+++ b/openrtx/include/interfaces/cps_io.h
@@ -87,7 +87,7 @@ int cps_readBankHeader(bankHdr_t *b_header, uint16_t pos);
  * @param pos: position of the channel index inside the bank.
  * @return the retrieved channel index on success, -1 on failure
  */
-int32_t cps_readBankData(uint16_t bank_pos, uint16_t pos);
+int cps_readBankData(uint16_t bank_pos, uint16_t pos);
 
 /**
  * Overwrite one contact to the codeplug stored in nonvolatile memory.
diff --git a/platform/drivers/CPS/cps_io_libc.c b/platform/drivers/CPS/cps_io_libc.c
index 1d8a53a7..0211f38f 100644
--- a/platform/drivers/CPS/cps_io_libc.c
+++ b/platform/drivers/CPS/cps_io_libc.c
@@ -296,7 +296,7 @@ int cps_readBankHeader(bankHdr_t *b_header, uint16_t pos)
     return 0;
 }
 
-int32_t cps_readBankData(uint16_t bank_pos, uint16_t pos)
+int cps_readBankData(uint16_t bank_pos, uint16_t pos)
 {
     cps_header_t header = { 0 };
     if (_readHeader(&header))
diff --git a/platform/drivers/CPS/cps_io_native_GDx.c b/platform/drivers/CPS/cps_io_native_GDx.c
index a43d8e3f..0b4a21dd 100644
--- a/platform/drivers/CPS/cps_io_native_GDx.c
+++ b/platform/drivers/CPS/cps_io_native_GDx.c
@@ -219,7 +219,7 @@ int cps_readBankHeader(bankHdr_t *b_header, uint16_t pos)
     return 0;
 }
 
-int32_t cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
+int cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
 {
     if(bank_pos >= maxNumZones) return -1;
 
diff --git a/platform/drivers/CPS/cps_io_native_MD3x0.c b/platform/drivers/CPS/cps_io_native_MD3x0.c
index 8c337de8..fa2cb028 100644
--- a/platform/drivers/CPS/cps_io_native_MD3x0.c
+++ b/platform/drivers/CPS/cps_io_native_MD3x0.c
@@ -168,7 +168,7 @@ int cps_readBankHeader(bankHdr_t *b_header, uint16_t pos)
     return 0;
 }
 
-int32_t cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
+int cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
 {
     if(bank_pos >= maxNumZones) return -1;
 
diff --git a/platform/drivers/CPS/cps_io_native_MD9600.c b/platform/drivers/CPS/cps_io_native_MD9600.c
index 5b302472..134cfca7 100644
--- a/platform/drivers/CPS/cps_io_native_MD9600.c
+++ b/platform/drivers/CPS/cps_io_native_MD9600.c
@@ -196,7 +196,7 @@ int cps_readBankHeader(bankHdr_t *b_header, uint16_t pos)
     return 0;
 }
 
-int32_t cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
+int cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
 {
     if(bank_pos >= maxNumZones) return -1;
 
diff --git a/platform/drivers/CPS/cps_io_native_MDUV3x0.c b/platform/drivers/CPS/cps_io_native_MDUV3x0.c
index 8cb523d3..84d34fed 100644
--- a/platform/drivers/CPS/cps_io_native_MDUV3x0.c
+++ b/platform/drivers/CPS/cps_io_native_MDUV3x0.c
@@ -196,7 +196,7 @@ int cps_readBankHeader(bankHdr_t *b_header, uint16_t pos)
     return 0;
 }
 
-int32_t cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
+int cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
 {
     if(bank_pos >= maxNumZones) return -1;
 
diff --git a/platform/drivers/CPS/cps_io_native_Mod17.c b/platform/drivers/CPS/cps_io_native_Mod17.c
index 7ca95008..a3ba5299 100644
--- a/platform/drivers/CPS/cps_io_native_Mod17.c
+++ b/platform/drivers/CPS/cps_io_native_Mod17.c
@@ -60,7 +60,7 @@ int cps_readBankHeader(bankHdr_t *b_header, uint16_t pos)
     return -1;
 }
 
-int32_t cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
+int cps_readBankData(uint16_t bank_pos, uint16_t ch_pos)
 {
     (void) bank_pos;
     (void) ch_pos;