diff --git a/src/Makefile.am b/src/Makefile.am
index 68fa19208..2125e14a8 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -143,6 +143,6 @@ if USE_AIKGEN
   SUBDIRS += aikgen
 endif
 
-if USE_TPM
+if USE_LIBTPMTSS
   SUBDIRS += tpm_extendpcr
 endif