--- OpenCL/OpenCL.xs	2011/11/17 04:17:43	1.11
+++ OpenCL/OpenCL.xs	2011/11/17 06:22:29	1.12
@@ -332,7 +332,7 @@
         XPUSH_NEW_OBJ ("OpenCL::Buffer", mem);
 
 void
-image2d (OpenCL::Context this, cl_mem_flags flags, cl_channel_order channel_order, cl_channel_type channel_type, size_t width, size_t height, size_t row_pitch, SV *data)
+image2d (OpenCL::Context this, cl_mem_flags flags, cl_channel_order channel_order, cl_channel_type channel_type, size_t width, size_t height, size_t row_pitch = 0, SV *data = &PL_sv_undef)
 	PPCODE:
 	STRLEN len;
         char *ptr = SvPVbyte (data, len);
@@ -341,7 +341,7 @@
         XPUSH_NEW_OBJ ("OpenCL::Image2D", mem);
 
 void
-image3d (OpenCL::Context this, cl_mem_flags flags, cl_channel_order channel_order, cl_channel_type channel_type, size_t width, size_t height, size_t depth, size_t row_pitch, size_t slice_pitch, SV *data)
+image3d (OpenCL::Context this, cl_mem_flags flags, cl_channel_order channel_order, cl_channel_type channel_type, size_t width, size_t height, size_t depth, size_t row_pitch = 0, size_t slice_pitch = 0, SV *data = &PL_sv_undef)
 	PPCODE:
 	STRLEN len;
         char *ptr = SvPVbyte (data, len);