diff --git a/samples/opengl/cube/cube.bkl b/samples/opengl/cube/cube.bkl
index efd8ace195..342b43bb7a 100644
--- a/samples/opengl/cube/cube.bkl
+++ b/samples/opengl/cube/cube.bkl
@@ -5,7 +5,7 @@
 
     <include file="../../../build/bakefiles/common_samples.bkl"/>
 
-    <exe id="cube" template="wx_sample" template_append="wx_append">
+    <exe id="cube" template="wx_sample" template_append="wx_append" cond="USE_OPENGL=='1'">
         <sources>cube.cpp</sources>
         <wx-lib>gl</wx-lib>
         <wx-lib>core</wx-lib>
diff --git a/samples/opengl/isosurf/isosurf.bkl b/samples/opengl/isosurf/isosurf.bkl
index fe7525f7af..05da183204 100644
--- a/samples/opengl/isosurf/isosurf.bkl
+++ b/samples/opengl/isosurf/isosurf.bkl
@@ -5,13 +5,13 @@
 
     <include file="../../../build/bakefiles/common_samples.bkl"/>
 
-    <exe id="isosurf" template="wx_sample" template_append="wx_append">
+    <exe id="isosurf" template="wx_sample" template_append="wx_append" cond="USE_OPENGL=='1'">
         <sources>isosurf.cpp</sources>
         <wx-lib>gl</wx-lib>
         <wx-lib>core</wx-lib>
         <wx-lib>base</wx-lib>
     </exe>
-    
+
     <wx-data id="data">
         <files>
             isosurf.dat.gz
diff --git a/samples/opengl/penguin/penguin.bkl b/samples/opengl/penguin/penguin.bkl
index 2d01b7ba4b..880e4e9fd4 100644
--- a/samples/opengl/penguin/penguin.bkl
+++ b/samples/opengl/penguin/penguin.bkl
@@ -5,7 +5,7 @@
 
     <include file="../../../build/bakefiles/common_samples.bkl"/>
 
-    <exe id="penguin" template="wx_sample" template_append="wx_append">
+    <exe id="penguin" template="wx_sample" template_append="wx_append" cond="USE_OPENGL=='1'">
         <sources>
             penguin.cpp
             lw.cpp
@@ -16,7 +16,7 @@
         <wx-lib>base</wx-lib>
         <win32-res>penguin.rc</win32-res>
     </exe>
-    
+
     <wx-data id="data">
         <files>
             penguin.lwo