diff --git a/ext/opencv/MotionCells.cpp b/ext/opencv/MotionCells.cpp
index f85989e..175ec90 100644
--- a/ext/opencv/MotionCells.cpp
+++ b/ext/opencv/MotionCells.cpp
@@ -51,6 +51,9 @@
 
 #include <errno.h>
 #include "MotionCells.h"
+#if (CV_MAJOR_VERSION >= 3)
+#include <opencv2/imgproc.hpp>
+#endif
 #include <opencv2/imgproc/imgproc_c.h>
 
 MotionCells::MotionCells ()
diff --git a/ext/opencv/gsthanddetect.cpp b/ext/opencv/gsthanddetect.cpp
index 60fd5be..47203fd 100644
--- a/ext/opencv/gsthanddetect.cpp
+++ b/ext/opencv/gsthanddetect.cpp
@@ -62,6 +62,9 @@
 
 /* element header */
 #include "gsthanddetect.h"
+#if (CV_MAJOR_VERSION >= 3)
+#include <opencv2/imgproc.hpp>
+#endif
 #include <opencv2/imgproc/imgproc_c.h>
 
 GST_DEBUG_CATEGORY_STATIC (gst_handdetect_debug);
diff --git a/ext/opencv/gsttemplatematch.cpp b/ext/opencv/gsttemplatematch.cpp
index f39208d..ec0b56a 100644
--- a/ext/opencv/gsttemplatematch.cpp
+++ b/ext/opencv/gsttemplatematch.cpp
@@ -63,6 +63,9 @@
 
 #include "../../gst-libs/gst/gst-i18n-plugin.h"
 #include "gsttemplatematch.h"
+#if (CV_MAJOR_VERSION >= 3)
+#include <opencv2/imgproc.hpp>
+#endif
 #include <opencv2/imgproc/imgproc_c.h>
 
 GST_DEBUG_CATEGORY_STATIC (gst_template_match_debug);