diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index bd513f73ef..390c769e71 100644
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -731,6 +731,8 @@ wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
     m_cols = cols;
     m_vgap = vgap;
     m_hgap = hgap;
+    if (m_rows == 0 && m_cols == 0)
+        m_rows = 1;
 }
 
 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
@@ -739,6 +741,8 @@ wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
     m_cols = cols;
     m_vgap = vgap;
     m_hgap = hgap;
+    if (m_rows == 0 && m_cols == 0)
+        m_rows = 1;
 }
 
 int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const