diff --git a/kcms/input/mouse.cpp b/kcms/input/mouse.cpp
--- a/kcms/input/mouse.cpp
+++ b/kcms/input/mouse.cpp
@@ -167,7 +167,7 @@
 
     QFormLayout *lay = new QFormLayout(advancedTab);
 
-    accel = new KDoubleNumInput(0.1, 20, 2, advancedTab, 0.1, 1);
+    accel = new KDoubleNumInput(0.0, 20, 2, advancedTab, 0.1, 1);
     accel->setSuffix(i18n(" x"));
     lay->addRow(i18n("Pointer acceleration:"), accel);
     connect(accel, SIGNAL(valueChanged(double)), this, SLOT(changed()));