diff --git a/src/include/ipc/info.h b/src/include/ipc/info.h
index f782b19d813d..523ce5498074 100644
--- a/src/include/ipc/info.h
+++ b/src/include/ipc/info.h
@@ -120,9 +120,9 @@ struct sof_ipc_cc_version {
 	/* reserved for future use */
 	uint32_t reserved[4];
 
-	char name[16]; /* null terminated compiler name */
-	char optim[4]; /* null terminated compiler -O flag value */
-	char desc[]; /* null terminated compiler description */
+	uint8_t name[16]; /* null terminated compiler name */
+	uint8_t optim[4]; /* null terminated compiler -O flag value */
+	uint8_t desc[32]; /* null terminated compiler description */
 } __attribute__((packed));
 
 /* extended data: Probe setup */
diff --git a/src/include/kernel/abi.h b/src/include/kernel/abi.h
index a442b760ab3e..0e3dc57762c2 100644
--- a/src/include/kernel/abi.h
+++ b/src/include/kernel/abi.h
@@ -29,7 +29,7 @@
 
 /** \brief SOF ABI version major, minor and patch numbers */
 #define SOF_ABI_MAJOR 3
-#define SOF_ABI_MINOR 14
+#define SOF_ABI_MINOR 15
 #define SOF_ABI_PATCH 0
 
 /** \brief SOF ABI version number. Format within 32bit word is MMmmmppp */
diff --git a/src/ipc/cc_version.c b/src/ipc/cc_version.c
index a32c45b34e1c..3771a108bcda 100644
--- a/src/ipc/cc_version.c
+++ b/src/ipc/cc_version.c
@@ -19,12 +19,16 @@
 	field = CC_OPTIMIZE_FLAGS, \
 	field[ARRAY_SIZE(((struct sof_ipc_cc_version *)(0))->optim) - 1] = 0
 
+/* copy CC_DESC to arrays during compilation time */
+#define CC_DESC_COPY(field) \
+	field = CC_DESC, \
+	field[ARRAY_SIZE(((struct sof_ipc_cc_version *)(0))->desc) - 1] = 0
+
 const struct sof_ipc_cc_version cc_version
 	__section(".fw_ready_metadata") = {
 	.ext_hdr = {
 		.hdr.cmd = SOF_IPC_FW_READY,
-		.hdr.size = ALIGN_UP(sizeof(struct sof_ipc_cc_version)
-				     + sizeof(CC_DESC), 4),
+		.hdr.size = sizeof(struct sof_ipc_cc_version),
 		.type = SOF_IPC_EXT_CC_INFO,
 	},
 	.micro = CC_MICRO,
@@ -32,5 +36,5 @@ const struct sof_ipc_cc_version cc_version
 	.major = CC_MAJOR,
 	CC_NAME_COPY(.name),
 	CC_OPTIM_COPY(.optim),
-	.desc = CC_DESC,
+	CC_DESC_COPY(.desc),
 };