diff --git a/src/arch/z80/backend/generic.py b/src/arch/z80/backend/generic.py
index 630db6514..08bb9286e 100644
--- a/src/arch/z80/backend/generic.py
+++ b/src/arch/z80/backend/generic.py
@@ -345,7 +345,7 @@ def _cast(ins: Quad):
     xsB = sB = YY_TYPES[tB]  # Type sizes
 
     if tA in ("u8", "i8") and tB == "bool":
-        return []  # bytes are booleans already (0 = False, not 0 = True)
+        return [*Bits8.get_oper(ins[4]), "push af"]  # bytes are booleans already (0 = False, not 0 = True)
 
     output = []
     if tA in ("u8", "i8", "bool"):
diff --git a/tests/functional/arch/zx48k/bool_crash.asm b/tests/functional/arch/zx48k/bool_crash.asm
index 342deb639..0c3f73144 100644
--- a/tests/functional/arch/zx48k/bool_crash.asm
+++ b/tests/functional/arch/zx48k/bool_crash.asm
@@ -38,7 +38,7 @@ _ReadKeys:
 	push ix
 	ld ix, 0
 	add ix, sp
-	pop af
+	ld a, (_pldx)
 	ld hl, (_pldx - 1)
 	or h
 	jp z, .LABEL.__LABEL1