diff --git a/src/gtk/app.cpp b/src/gtk/app.cpp
index d70f078447..38807e1eb9 100644
--- a/src/gtk/app.cpp
+++ b/src/gtk/app.cpp
@@ -288,18 +288,20 @@ bool wxApp::OnInitGui()
                 int bb = (b << 3) | (b >> 2);
 
                 GdkColor *colors = cmap->colors;
-                int max = 3 * 65536;
-                int index = -1;
+		if(colors)
+		{
+	                int max = 3 * 65536;
+                	int index = -1;
 
-                for (int i = 0; i < cmap->size; i++)
-                {
+                	for (int i = 0; i < cmap->size; i++)
+               	 {
                     int rdiff = ((rr << 8) - colors[i].red);
                     int gdiff = ((gg << 8) - colors[i].green);
                     int bdiff = ((bb << 8) - colors[i].blue);
                     int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
                     if (sum < max) { index = i; max = sum; }
                 }
-
+		}
                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
             }
         }
diff --git a/src/gtk1/app.cpp b/src/gtk1/app.cpp
index d70f078447..38807e1eb9 100644
--- a/src/gtk1/app.cpp
+++ b/src/gtk1/app.cpp
@@ -288,18 +288,20 @@ bool wxApp::OnInitGui()
                 int bb = (b << 3) | (b >> 2);
 
                 GdkColor *colors = cmap->colors;
-                int max = 3 * 65536;
-                int index = -1;
+		if(colors)
+		{
+	                int max = 3 * 65536;
+                	int index = -1;
 
-                for (int i = 0; i < cmap->size; i++)
-                {
+                	for (int i = 0; i < cmap->size; i++)
+               	 {
                     int rdiff = ((rr << 8) - colors[i].red);
                     int gdiff = ((gg << 8) - colors[i].green);
                     int bdiff = ((bb << 8) - colors[i].blue);
                     int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
                     if (sum < max) { index = i; max = sum; }
                 }
-
+		}
                 m_colorCube[ (r*1024) + (g*32) + b ] = index;
             }
         }