diff --git a/src/kgpgme.cpp b/src/kgpgme.cpp
index 026d2d3..2e19c7c 100644
--- a/src/kgpgme.cpp
+++ b/src/kgpgme.cpp
@@ -120,7 +120,7 @@ KGpgMe::~KGpgMe()
 
 void KGpgMe::clearCache()
 {
-	if(m_cache.size() > 0)
+	if(m_cache.length() > 0)
 	{
 		m_cache.fill('\0');
 		m_cache.truncate(0);