diff --git a/Machines/AmstradCPC/AmstradCPC.cpp b/Machines/AmstradCPC/AmstradCPC.cpp
index 316a5d3f7..32c0647a3 100644
--- a/Machines/AmstradCPC/AmstradCPC.cpp
+++ b/Machines/AmstradCPC/AmstradCPC.cpp
@@ -1088,6 +1088,7 @@ template <bool has_fdc> class ConcreteMachine:
 			// If there are any tapes supplied, use the first of them.
 			if(!media.tapes.empty()) {
 				tape_player_.set_tape(media.tapes.front());
+				set_use_fast_tape_hack();
 			}
 
 			// Insert up to four disks.
diff --git a/Machines/Sinclair/ZXSpectrum/ZXSpectrum.cpp b/Machines/Sinclair/ZXSpectrum/ZXSpectrum.cpp
index 34985a6d0..10ecf8460 100644
--- a/Machines/Sinclair/ZXSpectrum/ZXSpectrum.cpp
+++ b/Machines/Sinclair/ZXSpectrum/ZXSpectrum.cpp
@@ -432,6 +432,7 @@ template<Model model> class ConcreteMachine:
 			// If there are any tapes supplied, use the first of them.
 			if(!media.tapes.empty()) {
 				tape_player_.set_tape(media.tapes.front());
+				set_use_fast_tape();
 			}
 
 			// Insert up to four disks.