diff --git a/src/mame/sinclair/sprinter.cpp b/src/mame/sinclair/sprinter.cpp
index 47d079ba32d..36fbe833244 100644
--- a/src/mame/sinclair/sprinter.cpp
+++ b/src/mame/sinclair/sprinter.cpp
@@ -239,6 +239,7 @@ private:
 	bool    m_z80_m1;
 	offs_t  m_z80_addr;
 	u8      m_z80_data;
+	u8      m_z80_data_odd;
 	bool    m_deferring;
 	bool    m_skip_write;
 	std::list<std::pair<u16, u16>> m_ints;
@@ -987,6 +988,10 @@ void sprinter_state::check_accel(bool is_read, offs_t offset, u8 &data)
 		m_in_out_cmd = false;
 	}
 
+	if (~offset & 1) {
+		m_z80_data_odd = data;
+	}
+
 	const bool accel_go_case = m_access_state == ACCEL_OFF && !m_z80_m1 && m_acc_dir && acc_ena();
 	if (is_ram && (!accel_go_case || m_deferring))
 	{