diff --git a/src/tpm12/tpm_nvram.c b/src/tpm12/tpm_nvram.c
index 1b9c005b..620944e2 100644
--- a/src/tpm12/tpm_nvram.c
+++ b/src/tpm12/tpm_nvram.c
@@ -1288,7 +1288,7 @@ TPM_RESULT TPM_Process_NVReadValue(tpm_state_t *tpm_state,
     TPM_BOOL			ignore_auth = FALSE;
     TPM_BOOL			dir = FALSE;
     TPM_BOOL			physicalPresence;
-    TPM_BOOL			isGPIO;
+    TPM_BOOL			isGPIO = FALSE;
     BYTE 			*gpioData = NULL;
     TPM_NV_DATA_SENSITIVE	*d1NvdataSensitive;
     uint32_t			s1Last;
@@ -2000,7 +2000,7 @@ TPM_RESULT TPM_Process_NVWriteValue(tpm_state_t *tpm_state,
     TPM_NV_DATA_SENSITIVE	*d1NvdataSensitive;
     uint32_t			s1Last;
     TPM_BOOL			physicalPresence;
-    TPM_BOOL			isGPIO;
+    TPM_BOOL			isGPIO = FALSE;
     uint32_t			nv1 = tpm_state->tpm_permanent_data.noOwnerNVWrite;
 							/* temp for noOwnerNVWrite, initialize to
 							   silence compiler */
diff --git a/src/tpm12/tpm_process.c b/src/tpm12/tpm_process.c
index f144a1b6..474c4c63 100644
--- a/src/tpm12/tpm_process.c
+++ b/src/tpm12/tpm_process.c
@@ -4844,7 +4844,7 @@ TPM_RESULT TPM_Process_GetCapabilitySigned(tpm_state_t *tpm_state,
     unsigned char *	inParamEnd;		/* ending point of inParam's */
     TPM_DIGEST		inParamDigest;
     TPM_BOOL		auditStatus;		/* audit the ordinal */
-    TPM_BOOL		transportEncrypt;	/* wrapped in encrypted transport session */
+    TPM_BOOL		transportEncrypt = FALSE;/* wrapped in encrypted transport session */
     TPM_BOOL		authHandleValid = FALSE;
     TPM_AUTH_SESSION_DATA *auth_session_data;	/* session data for authHandle */
     TPM_SECRET		*hmacKey;
@@ -5144,7 +5144,7 @@ TPM_RESULT TPM_Process_SetCapability(tpm_state_t *tpm_state,
     unsigned char *	inParamEnd;		/* ending point of inParam's */
     TPM_DIGEST		inParamDigest;
     TPM_BOOL		auditStatus;		/* audit the ordinal */
-    TPM_BOOL		transportEncrypt;	/* wrapped in encrypted transport session */
+    TPM_BOOL		transportEncrypt = FALSE;/* wrapped in encrypted transport session */
     TPM_BOOL		authHandleValid = FALSE;
     TPM_AUTH_SESSION_DATA *auth_session_data;	/* session data for authHandle */
     TPM_SECRET		*hmacKey;
diff --git a/src/tpm12/tpm_transport.c b/src/tpm12/tpm_transport.c
index 22616705..7b9c520f 100644
--- a/src/tpm12/tpm_transport.c
+++ b/src/tpm12/tpm_transport.c
@@ -2599,7 +2599,7 @@ TPM_RESULT TPM_Process_ReleaseTransportSigned(tpm_state_t *tpm_state,
     TPM_BOOL			authHandleValid = FALSE;
     TPM_BOOL			transHandleValid = FALSE;
     TPM_AUTH_SESSION_DATA	*auth_session_data = NULL;	/* session data for authHandle */
-    TPM_TRANSPORT_INTERNAL	*t1TpmTransportInternal;
+    TPM_TRANSPORT_INTERNAL	*t1TpmTransportInternal = NULL;
     TPM_SECRET			*hmacKey;
     TPM_KEY			*sigKey = NULL;		/* the key specified by keyHandle */
     TPM_BOOL			parentPCRStatus;