diff --git a/src/drivers/i2c/tpm/tpm.c b/src/drivers/i2c/tpm/tpm.c
index dc4ab78149..63ef29547f 100644
--- a/src/drivers/i2c/tpm/tpm.c
+++ b/src/drivers/i2c/tpm/tpm.c
@@ -45,12 +45,6 @@
 #include <device/i2c.h>
 #include "tpm.h"
 
-/* max. buffer size supported by our TPM */
-#ifdef TPM_BUFSIZE
-#undef TPM_BUFSIZE
-#endif
-#define TPM_BUFSIZE 1260
-
 /* Address of the TPM on the I2C bus */
 #define TPM_I2C_ADDR 0x20
 
diff --git a/src/drivers/i2c/tpm/tpm.h b/src/drivers/i2c/tpm/tpm.h
index 6d195a1985..de88a661a3 100644
--- a/src/drivers/i2c/tpm/tpm.h
+++ b/src/drivers/i2c/tpm/tpm.h
@@ -42,8 +42,8 @@ enum tpm_timeout {
 	TPM_TIMEOUT = 1,	/* msecs */
 };
 
-/* Size of external transmit buffer (used in tpm_transmit)*/
-#define TPM_BUFSIZE 4096
+/* Size of external transmit buffer (used for stack buffer in tpm_sendrecv) */
+#define TPM_BUFSIZE 1260
 
 /* Index of fields in TPM command buffer */
 #define TPM_CMD_SIZE_BYTE 2