diff --git a/envi/envi.h b/envi/envi.h
index a75bd77..6914b72 100644
--- a/envi/envi.h
+++ b/envi/envi.h
@@ -463,6 +463,16 @@ public:
 		return true;
 	}
 
+	bool band(void* ptr, double wavelength){
+
+		if(header.interleave == envi_header::BSQ){		//if the infile is bsq file
+			if(header.data_type ==envi_header::float32)
+				return ((bsq<float>*)file)->band((float*)ptr, wavelength);
+
+		}
+
+	}
+
 
 
 
--
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