diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/keyremapping/KeyRemappingListener.java b/runelite-client/src/main/java/net/runelite/client/plugins/keyremapping/KeyRemappingListener.java
index 25c0da9576..181c4abf8c 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/keyremapping/KeyRemappingListener.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/keyremapping/KeyRemappingListener.java
@@ -155,7 +155,9 @@ class KeyRemappingListener implements KeyListener
 				}
 			}
 
-			if (plugin.isDialogOpen() && config.space().matches(e))
+			// Do not remap to space key when the options dialog is open, since the options dialog never
+			// listens for space, and the remapped key may be one of keys it listens for.
+			if (plugin.isDialogOpen() && !plugin.isOptionsDialogOpen() && config.space().matches(e))
 			{
 				mappedKeyCode = KeyEvent.VK_SPACE;
 			}
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/keyremapping/KeyRemappingPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/keyremapping/KeyRemappingPlugin.java
index d0bcbf6d4f..a1b1034b26 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/keyremapping/KeyRemappingPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/keyremapping/KeyRemappingPlugin.java
@@ -144,6 +144,11 @@ public class KeyRemappingPlugin extends Plugin
 			|| !isHidden(WidgetInfo.BANK_PIN_CONTAINER);
 	}
 
+	boolean isOptionsDialogOpen()
+	{
+		return client.getWidget(WidgetInfo.DIALOG_OPTION) != null;
+	}
+
 	private boolean isHidden(WidgetInfo widgetInfo)
 	{
 		Widget w = client.getWidget(widgetInfo);
diff --git a/runelite-client/src/test/java/net/runelite/client/plugins/keyremapping/KeyRemappingListenerTest.java b/runelite-client/src/test/java/net/runelite/client/plugins/keyremapping/KeyRemappingListenerTest.java
index 4d3b3b3005..d7da96133d 100644
--- a/runelite-client/src/test/java/net/runelite/client/plugins/keyremapping/KeyRemappingListenerTest.java
+++ b/runelite-client/src/test/java/net/runelite/client/plugins/keyremapping/KeyRemappingListenerTest.java
@@ -105,4 +105,22 @@ public class KeyRemappingListenerTest
 		verify(event).setKeyCode(KeyEvent.VK_RIGHT);
 		verify(event).setKeyChar(KeyEvent.CHAR_UNDEFINED);
 	}
+
+	@Test
+	public void testSpaceRemap()
+	{
+		when(keyRemappingConfig.space()).thenReturn(new ModifierlessKeybind(KeyEvent.VK_NUMPAD1, 0));
+
+		when(keyRemappingPlugin.chatboxFocused()).thenReturn(true);
+		when(keyRemappingPlugin.isDialogOpen()).thenReturn(true);
+
+		KeyEvent event = mock(KeyEvent.class);
+		when(event.getKeyChar()).thenReturn('1');
+		when(event.getKeyCode()).thenReturn(KeyEvent.VK_NUMPAD1);
+		when(event.getExtendedKeyCode()).thenReturn(KeyEvent.VK_NUMPAD1); // for keybind matches()
+
+		keyRemappingListener.keyPressed(event);
+
+		verify(event).setKeyCode(KeyEvent.VK_SPACE);
+	}
 }