diff --git a/src/gtk/dcclient.cpp b/src/gtk/dcclient.cpp
index 0e930e4cff..a99a0791e7 100644
--- a/src/gtk/dcclient.cpp
+++ b/src/gtk/dcclient.cpp
@@ -1452,14 +1452,23 @@ void wxWindowDC::SetPen( const wxPen &pen )
         {
             for (int i = 0; i < req_nb_dash; i++)
                 real_req_dash[i] = req_dash[i] * width;
+#if GTK_CHECK_VERSION(1,2,7)
             gdk_gc_set_dashes( m_penGC, 0, (gint8*) real_req_dash,
 			      req_nb_dash );
+#else
+            gdk_gc_set_dashes( m_penGC, 0, real_req_dash,
+			      req_nb_dash );
+#endif
             delete[] real_req_dash;
         }
         else
         {
             // No Memory. We use non-scaled dash pattern...
+#if GTK_CHECK_VERSION(1,2,7)
             gdk_gc_set_dashes( m_penGC, 0, (gint8*)req_dash, req_nb_dash );
+#else
+            gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
+#endif
         }
     }
 #endif
diff --git a/src/gtk1/dcclient.cpp b/src/gtk1/dcclient.cpp
index 0e930e4cff..a99a0791e7 100644
--- a/src/gtk1/dcclient.cpp
+++ b/src/gtk1/dcclient.cpp
@@ -1452,14 +1452,23 @@ void wxWindowDC::SetPen( const wxPen &pen )
         {
             for (int i = 0; i < req_nb_dash; i++)
                 real_req_dash[i] = req_dash[i] * width;
+#if GTK_CHECK_VERSION(1,2,7)
             gdk_gc_set_dashes( m_penGC, 0, (gint8*) real_req_dash,
 			      req_nb_dash );
+#else
+            gdk_gc_set_dashes( m_penGC, 0, real_req_dash,
+			      req_nb_dash );
+#endif
             delete[] real_req_dash;
         }
         else
         {
             // No Memory. We use non-scaled dash pattern...
+#if GTK_CHECK_VERSION(1,2,7)
             gdk_gc_set_dashes( m_penGC, 0, (gint8*)req_dash, req_nb_dash );
+#else
+            gdk_gc_set_dashes( m_penGC, 0, (char*)req_dash, req_nb_dash );
+#endif
         }
     }
 #endif