diff --git a/hw/acpi/tpm.c b/hw/acpi/tpm.c
index b96459e45b..cdc0227536 100644
--- a/hw/acpi/tpm.c
+++ b/hw/acpi/tpm.c
@@ -57,7 +57,7 @@ void tpm_build_ppi_acpi(TPMIf *tpm, Aml *dev)
                aml_operation_region(
                    "TPP3", AML_SYSTEM_MEMORY,
                    aml_int(TPM_PPI_ADDR_BASE +
-                           0x15a /* movv, docs/specs/tpm.txt */),
+                           0x15a /* movv, docs/specs/tpm.rst */),
                            0x1));
     field = aml_field("TPP3", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE);
     aml_append(field, aml_named_field("MOVV", 8));
diff --git a/hw/tpm/tpm_ppi.c b/hw/tpm/tpm_ppi.c
index 72d7a3d926..362edcc5c9 100644
--- a/hw/tpm/tpm_ppi.c
+++ b/hw/tpm/tpm_ppi.c
@@ -23,7 +23,7 @@
 
 void tpm_ppi_reset(TPMPPI *tpmppi)
 {
-    if (tpmppi->buf[0x15a /* movv, docs/specs/tpm.txt */] & 0x1) {
+    if (tpmppi->buf[0x15a /* movv, docs/specs/tpm.rst */] & 0x1) {
         GuestPhysBlockList guest_phys_blocks;
         GuestPhysBlock *block;