diff --git a/core/divefilter.cpp b/core/divefilter.cpp
index 87b5846f8..3ea69a0ba 100644
--- a/core/divefilter.cpp
+++ b/core/divefilter.cpp
@@ -114,7 +114,9 @@ DiveFilter *DiveFilter::instance()
 	return &self;
 }
 
-DiveFilter::DiveFilter() : diveSiteRefCount(0)
+DiveFilter::DiveFilter() :
+	shown_dives(0),
+	diveSiteRefCount(0)
 {
 }