diff --git a/sdrbase/gui/valuedialz.cpp b/sdrbase/gui/valuedialz.cpp
index 6cb255826..e7f9513c5 100644
--- a/sdrbase/gui/valuedialz.cpp
+++ b/sdrbase/gui/valuedialz.cpp
@@ -358,7 +358,7 @@ void ValueDialZ::mouseMoveEvent(QMouseEvent* event)
     {
         i = -1;
     }
-    else if ((m_text[i] == QChar('+')) || (m_text[i] != QChar('-')))
+    else if ((m_text[i] == QChar('+')) || (m_text[i] == QChar('-')))
     {
         i = -1;
     }