diff --git a/src/mess/machine/teleprinter.c b/src/mess/machine/teleprinter.c
index 843c81f632e..c45366607ff 100644
--- a/src/mess/machine/teleprinter.c
+++ b/src/mess/machine/teleprinter.c
@@ -139,7 +139,7 @@ teleprinter_device::teleprinter_device(const machine_config &mconfig, const char
 
 void teleprinter_device::scroll_line()
 {
-	memcpy(m_buffer,m_buffer+TELEPRINTER_WIDTH,(TELEPRINTER_HEIGHT-1)*TELEPRINTER_WIDTH);
+	memmove(m_buffer,m_buffer+TELEPRINTER_WIDTH,(TELEPRINTER_HEIGHT-1)*TELEPRINTER_WIDTH);
 	memset(m_buffer + TELEPRINTER_WIDTH*(TELEPRINTER_HEIGHT-1),0x20,TELEPRINTER_WIDTH);
 }
 
diff --git a/src/mess/machine/terminal.c b/src/mess/machine/terminal.c
index 84c1b62f7e7..b25c03dd6e4 100644
--- a/src/mess/machine/terminal.c
+++ b/src/mess/machine/terminal.c
@@ -152,7 +152,7 @@ generic_terminal_device::generic_terminal_device(const machine_config &mconfig,
 
 void generic_terminal_device::scroll_line()
 {
-	memcpy(m_buffer,m_buffer+TERMINAL_WIDTH,(TERMINAL_HEIGHT-1)*TERMINAL_WIDTH);
+	memmove(m_buffer,m_buffer+TERMINAL_WIDTH,(TERMINAL_HEIGHT-1)*TERMINAL_WIDTH);
 	memset(m_buffer + TERMINAL_WIDTH*(TERMINAL_HEIGHT-1),0x20,TERMINAL_WIDTH);
 }