diff --git a/src/devices/video/EmuNV2A_PTIMER.cpp b/src/devices/video/EmuNV2A_PTIMER.cpp
index db3b0777b..c78ea1554 100644
--- a/src/devices/video/EmuNV2A_PTIMER.cpp
+++ b/src/devices/video/EmuNV2A_PTIMER.cpp
@@ -12,7 +12,7 @@ static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
 	rl = (uint64_t)u.l.low * (uint64_t)b;
 	rh = (uint64_t)u.l.high * (uint64_t)b;
 	rh += (rl >> 32);
-	res.l.high = rh / c;
+	res.l.high = (uint32_t)rh / c;
 	res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
 	return res.ll;
 }
@@ -21,10 +21,10 @@ static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
 static uint64_t ptimer_get_clock(NV2AState * d)
 {
 	// Get time in nanoseconds
-	long int time = static_cast<long int>(std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::high_resolution_clock::now().time_since_epoch()).count());
+    uint64_t time = std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::high_resolution_clock::now().time_since_epoch()).count();
 	
 	return muldiv64(time,
-					d->pramdac.core_clock_freq * d->ptimer.numerator,
+					uint32_t(d->pramdac.core_clock_freq * d->ptimer.numerator),
 					CLOCKS_PER_SEC * d->ptimer.denominator);
 }