diff --git a/src/security/sec-tpm.hpp b/src/security/sec-tpm.hpp
index 2be17d8..97547a4 100644
--- a/src/security/sec-tpm.hpp
+++ b/src/security/sec-tpm.hpp
@@ -261,7 +261,7 @@
   getImpExpPassWord(std::string& password, const std::string& prompt);
 };
 
-bool
+inline bool
 SecTpm::getImpExpPassWord(std::string& password, const std::string& prompt)
 {
   int result = false;