diff --git a/game/reconstructed/mech4.cpp b/game/reconstructed/mech4.cpp
index 65a5597..0c7f560 100644
--- a/game/reconstructed/mech4.cpp
+++ b/game/reconstructed/mech4.cpp
@@ -2760,8 +2760,18 @@ void
 					// task #12: Generator1-4 actions assign the selected weapon
 					// to Generator A..D; Reconnect toggles Manual/Auto.
 					gBTGenSelKey      = gBTInput.genSel;
-					// issue #26: -/= step the master volume (edge-detected;
-					// VK_OEM_MINUS/VK_OEM_PLUS, focus-guarded like all polls).
+					// issue #26: master volume keys (edge-detected, focus-guarded
+					// like all polls).  MOVED -/= -> PgDn/PgUp (2026-07-26): the
+					// old VK_OEM_MINUS/VK_OEM_PLUS poll shared its physical keys
+					// with the authentic 1995 typed-character target-zoom hotkeys
+					// ('+'/'-'), so one press zoomed AND stepped the volume -- a
+					// long-standing double-fire the operator had noticed.  PgUp/
+					// PgDn produce NO WM_CHAR, so they cannot collide with any
+					// typed hotkey, they are unbound in every bindings layout
+					// (including the glass-cockpit-refit keyboard board, which
+					// consumes -/= as Comm-bank buttons), and they exist on
+					// tenkeyless keyboards.  Numpad +/- were rejected for the
+					// same reason -/= failed: their typed chars feed the zoom.
 					{
 						extern void BTAudioMasterVolumeStep(int direction);
 						static int sVolDn = 0, sVolUp = 0;
@@ -2770,9 +2780,9 @@ void
 							GetWindowThreadProcessId(GetForegroundWindow(), &fgpid);
 						int focused_vol = (fgpid == GetCurrentProcessId());
 						int dn = focused_vol
-							&& (GetAsyncKeyState(VK_OEM_MINUS) & 0x8000) != 0;
+							&& (GetAsyncKeyState(VK_NEXT) & 0x8000) != 0;
 						int up = focused_vol
-							&& (GetAsyncKeyState(VK_OEM_PLUS) & 0x8000) != 0;
+							&& (GetAsyncKeyState(VK_PRIOR) & 0x8000) != 0;
 						if (dn && !sVolDn) BTAudioMasterVolumeStep(-1);
 						if (up && !sVolUp) BTAudioMasterVolumeStep(+1);
 						sVolDn = dn;