diff --git a/src/pow/tromp/equi_miner.h b/src/pow/tromp/equi_miner.h
index ae527827a..d53d0d8aa 100644
--- a/src/pow/tromp/equi_miner.h
+++ b/src/pow/tromp/equi_miner.h
@@ -25,7 +25,13 @@
 #include <assert.h>
 
 typedef uint16_t u16;
+#ifdef _WIN32
+typedef unsigned long long u64;
+#elif __linux__
 typedef uint64_t u64;
+#else
+typedef unsigned long u64;
+#endif
 
 #ifdef EQUIHASH_TROMP_ATOMIC
 #include <atomic>