diff --git a/src/emu/cpu/tlcs90/tlcs90.c b/src/emu/cpu/tlcs90/tlcs90.c
index a5c866c7f54..1e3d5dde80a 100644
--- a/src/emu/cpu/tlcs90/tlcs90.c
+++ b/src/emu/cpu/tlcs90/tlcs90.c
@@ -2377,7 +2377,7 @@ void tlcs90_device::t90_start_timer(int i)
 
 	m_timer[i]->adjust(period, i, period);
 
-	logerror("%04X: CPU Timer %d started at %lf Hz\n", m_pc.w.l, i, 1.0 / period.as_double());
+	logerror("%04X: CPU Timer %d started at %f Hz\n", m_pc.w.l, i, 1.0 / period.as_double());
 }
 
 void tlcs90_device::t90_start_timer4()
@@ -2399,7 +2399,7 @@ void tlcs90_device::t90_start_timer4()
 
 	m_timer[4]->adjust(period, 4, period);
 
-	logerror("%04X: CPU Timer 4 started at %lf Hz\n", m_pc.w.l, 1.0 / period.as_double());
+	logerror("%04X: CPU Timer 4 started at %f Hz\n", m_pc.w.l, 1.0 / period.as_double());
 }
 
 
diff --git a/src/emu/machine/6840ptm.c b/src/emu/machine/6840ptm.c
index 410758b9eaf..239498f681c 100644
--- a/src/emu/machine/6840ptm.c
+++ b/src/emu/machine/6840ptm.c
@@ -407,7 +407,7 @@ void ptm6840_device::reload_count(int idx)
 		duration *= m_t3_divisor;
 	}
 
-	PLOG(("MC6840 #%s: reload_count(%d): output = %lf\n", tag(), idx, duration.as_double()));
+	PLOG(("MC6840 #%s: reload_count(%d): output = %f\n", tag(), idx, duration.as_double()));
 
 #if 0
 	if (!(m_control_reg[idx] & 0x02))