diff --git a/src/crypto/equihash.tcc b/src/crypto/equihash.tcc
index 9b0190811..1496c174d 100644
--- a/src/crypto/equihash.tcc
+++ b/src/crypto/equihash.tcc
@@ -27,7 +27,7 @@ bool IsProbablyDuplicate(std::shared_ptr<eh_trunc> indices, size_t lenIndices)
 {
     assert(lenIndices <= MAX_INDICES);
     bool checked_index[MAX_INDICES] = {false};
-    bool count_checked = 0;
+    int count_checked = 0;
     for (int z = 0; z < lenIndices; z++) {
         // Skip over indices we have already paired
         if (!checked_index[z]) {