diff --git a/stepmania/src/GameState.cpp b/stepmania/src/GameState.cpp
index c49ca71ca8..7295840c03 100644
--- a/stepmania/src/GameState.cpp
+++ b/stepmania/src/GameState.cpp
@@ -1021,7 +1021,7 @@ void GameState::GetRankingFeats( PlayerNumber pn, vector<RankingFeats> &asFeatsO
 
 			for( i=0; i<g_vPlayedStageStats.size(); i++ )
 			{
-				CHECKPOINT_M( ssprintf("%u/%zu", i, g_vPlayedStageStats.size() ) );
+				CHECKPOINT_M( ssprintf("%u/%i", i, (int)g_vPlayedStageStats.size() ) );
 				SongAndSteps sas;
 				sas.pSong = g_vPlayedStageStats[i].pSong;
 				ASSERT( sas.pSong );
diff --git a/stepmania/src/ScreenOptions.cpp b/stepmania/src/ScreenOptions.cpp
index dca6641a1e..ff42fffe51 100644
--- a/stepmania/src/ScreenOptions.cpp
+++ b/stepmania/src/ScreenOptions.cpp
@@ -514,7 +514,7 @@ CString ScreenOptions::GetExplanationTitle( int iRow ) const
 
 BitmapText &ScreenOptions::GetTextItemForRow( PlayerNumber pn, int iRow, int iChoiceOnRow )
 {
-	RAGE_ASSERT_M( iRow < (int)m_Rows.size(), ssprintf("%i < %zu", iRow, m_Rows.size() ) );
+	RAGE_ASSERT_M( iRow < (int)m_Rows.size(), ssprintf("%i < %i", iRow, (int)m_Rows.size() ) );
 	Row &row = *m_Rows[iRow];
 	if( row.Type == Row::ROW_EXIT )
 		return *row.m_textItems[0];
@@ -526,7 +526,7 @@ BitmapText &ScreenOptions::GetTextItemForRow( PlayerNumber pn, int iRow, int iCh
 	else
 		index = iChoiceOnRow;
 
-	RAGE_ASSERT_M( index < (int)row.m_textItems.size(), ssprintf("%i < %zu", index, row.m_textItems.size() ) );
+	RAGE_ASSERT_M( index < (int)row.m_textItems.size(), ssprintf("%i < %i", index, (int)row.m_textItems.size() ) );
 	return *row.m_textItems[index];
 }
 
@@ -680,7 +680,7 @@ void ScreenOptions::PositionCursors()
 			continue;
 
 		const int iRow = m_iCurrentRow[pn];
-		RAGE_ASSERT_M( iRow < (int)m_Rows.size(), ssprintf("%i < %zu", iRow, m_Rows.size() ) );
+		RAGE_ASSERT_M( iRow < (int)m_Rows.size(), ssprintf("%i < %i", iRow, (int)m_Rows.size() ) );
 		Row &Row = *m_Rows[iRow];
 
 		OptionsCursor &highlight = m_Highlight[pn];
@@ -698,7 +698,7 @@ void ScreenOptions::TweenCursor( PlayerNumber pn )
 {
 	// Set the position of the highlight showing the current option the user is changing.
 	const int iRow = m_iCurrentRow[pn];
-	RAGE_ASSERT_M( iRow < (int)m_Rows.size(), ssprintf("%i < %zu", iRow, m_Rows.size() ) );
+	RAGE_ASSERT_M( iRow < (int)m_Rows.size(), ssprintf("%i < %i", iRow, (int)m_Rows.size() ) );
 
 	const Row &Row = *m_Rows[iRow];
 	const int iChoiceWithFocus = Row.m_iChoiceWithFocus[pn];