diff --git a/layout/generic/nsTextFrame.cpp b/layout/generic/nsTextFrame.cpp
index 087a50108ea..b2038713385 100644
--- a/layout/generic/nsTextFrame.cpp
+++ b/layout/generic/nsTextFrame.cpp
@@ -243,15 +243,15 @@ NS_DECLARE_FRAME_PROPERTY(TextFrameGlyphObservers, DestroyGlyphObserverList);
 // Set when this text frame is mentioned in the userdata for mTextRun
 #define TEXT_IN_TEXTRUN_USER_DATA  NS_FRAME_STATE_BIT(29)
 
+// nsTextFrame.h has
+// #define TEXT_IS_IN_SINGLE_CHAR_MI        NS_FRAME_STATE_BIT(30)
+
 // nsTextFrame.h has
 // #define TEXT_HAS_NONCOLLAPSED_CHARACTERS NS_FRAME_STATE_BIT(31)
 
 // nsTextFrame.h has
 // #define TEXT_IS_IN_TOKEN_MATHML          NS_FRAME_STATE_BIT(32)
 
-// nsTextFrame.h has
-// #define TEXT_IS_IN_SINGLE_CHAR_MI        NS_FRAME_STATE_BIT(59)
-
 // Set when this text frame is mentioned in the userdata for the
 // uninflated textrun property
 #define TEXT_IN_UNINFLATED_TEXTRUN_USER_DATA NS_FRAME_STATE_BIT(60)
diff --git a/layout/generic/nsTextFrame.h b/layout/generic/nsTextFrame.h
index a7154530a02..f6f24a3abf6 100644
--- a/layout/generic/nsTextFrame.h
+++ b/layout/generic/nsTextFrame.h
@@ -17,6 +17,11 @@
 class nsTextPaintStyle;
 class PropertyProvider;
 
+// This state bit is set on text frames within token MathML elements if the
+// token represents an <mi> tag whose inner HTML consists of a single
+// non-whitespace character to allow special rendering behaviour.
+#define TEXT_IS_IN_SINGLE_CHAR_MI        NS_FRAME_STATE_BIT(30)
+
 // This state bit is set on frames that have some non-collapsed characters after
 // reflow
 #define TEXT_HAS_NONCOLLAPSED_CHARACTERS NS_FRAME_STATE_BIT(31)
@@ -24,11 +29,6 @@ class PropertyProvider;
 // This state bit is set on children of token MathML elements
 #define TEXT_IS_IN_TOKEN_MATHML          NS_FRAME_STATE_BIT(32)
 
-// This state bit is set on token MathML elements if the token represents an
-// <mi> tag whose inner HTML consists of a single non-whitespace character
-// to allow special rendering behaviour.
-#define TEXT_IS_IN_SINGLE_CHAR_MI        NS_FRAME_STATE_BIT(59)
-
 #define TEXT_HAS_FONT_INFLATION          NS_FRAME_STATE_BIT(61)
 
 typedef nsFrame nsTextFrameBase;