diff --git a/common/rfb/SMsgWriter.cxx b/common/rfb/SMsgWriter.cxx
index 3698cb6..0d61292 100644
--- a/common/rfb/SMsgWriter.cxx
+++ b/common/rfb/SMsgWriter.cxx
@@ -18,7 +18,6 @@
  * USA.
  */
 #include <stdio.h>
-#include <assert.h>
 #include <rdr/OutStream.h>
 #include <rfb/msgTypes.h>
 #include <rfb/fenceTypes.h>
diff --git a/common/rfb/UpdateTracker.cxx b/common/rfb/UpdateTracker.cxx
index 14ac49d..b53b850 100644
--- a/common/rfb/UpdateTracker.cxx
+++ b/common/rfb/UpdateTracker.cxx
@@ -21,8 +21,6 @@
 // Tracks updated regions and a region-copy event, too
 //
 
-#include <assert.h>
-
 #include <rfb/UpdateTracker.h>
 #include <rfb/LogWriter.h>
 
diff --git a/common/rfb/tightDecode.h b/common/rfb/tightDecode.h
index 0089f45..fe18ce8 100644
--- a/common/rfb/tightDecode.h
+++ b/common/rfb/tightDecode.h
@@ -28,7 +28,6 @@
 #include <rdr/ZlibInStream.h>
 #include <rfb/Exception.h>
 #include <rfb/TightConstants.h>
-#include <assert.h>
 
 namespace rfb {
 
diff --git a/vncviewer/Win32PixelBuffer.cxx b/vncviewer/Win32PixelBuffer.cxx
index 4871816..3f82530 100644
--- a/vncviewer/Win32PixelBuffer.cxx
+++ b/vncviewer/Win32PixelBuffer.cxx
@@ -21,7 +21,6 @@
 #include <config.h>
 #endif
 
-#include <assert.h>
 #include <stdlib.h>
 
 #include <windows.h>