--- a/src/OPERATORS/op-bm-b.cc
+++ b/src/OPERATORS/op-bm-b.cc
@@ -31,7 +31,18 @@
 #include "ov-bool.h"
 #include "ov-bool-mat.h"
 #include "ov-scalar.h"
+#include "ov-range.h"
 #include "ov-re-mat.h"
+#include "ov-re-sparse.h"
+#include "ov-str-mat.h"
+#include "ov-int8.h"
+#include "ov-int16.h"
+#include "ov-int32.h"
+#include "ov-int64.h"
+#include "ov-uint8.h"
+#include "ov-uint16.h"
+#include "ov-uint32.h"
+#include "ov-uint64.h"
 #include "ov-typeinfo.h"
 #include "ops.h"
 #include "xdiv.h"
@@ -48,6 +59,24 @@
 
 DEFNDASSIGNOP_FN (assign, bool_matrix, bool, bool_array, assign)
 
+static octave_value
+oct_assignop_conv_and_assign (octave_base_value& a1,
+			      const octave_value_list& idx,
+			      const octave_base_value& a2)
+{
+  octave_bool_matrix& v1 = dynamic_cast<octave_bool_matrix&> (a1);
+
+  // FIXME -- perhaps add a warning for this conversion if the values
+  // are not all 0 or 1?
+
+  boolNDArray v2 = a2.bool_array_value ();
+
+  if (! error_state)
+    v1.assign (idx, v2);
+
+  return octave_value ();
+}
+
 void
 install_bm_b_ops (void)
 {
@@ -59,6 +88,22 @@
   INSTALL_CATOP (octave_matrix, octave_bool, m_b);
 
   INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_bool, assign);
+
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_scalar, conv_and_assign);
+
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_range, conv_and_assign);
+
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_sparse_matrix, conv_and_assign);
+
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_int8_scalar, conv_and_assign);
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_int16_scalar, conv_and_assign);
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_int32_scalar, conv_and_assign);
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_int64_scalar, conv_and_assign);
+
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_uint8_scalar, conv_and_assign);
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_uint16_scalar, conv_and_assign);
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_uint32_scalar, conv_and_assign);
+  INSTALL_ASSIGNOP (op_asn_eq, octave_bool_matrix, octave_uint64_scalar, conv_and_assign);
 }
 
 /*