diff --git a/src/dedupe.c b/src/dedupe.c
index 76eb87e1..c73c94ea 100644
--- a/src/dedupe.c
+++ b/src/dedupe.c
@@ -17,7 +17,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#define DEDUPE_HASH_SLOTS 32
+#define DEDUPE_HASH_SLOTS 31
 typedef struct dedupe_entry {
     struct dedupe_entry *next;
     int trigger_date;