diff --git a/mysql-test/r/type_bit.result b/mysql-test/r/type_bit.result
index 4c4fcb9a9ae..68c0e1635a3 100644
--- a/mysql-test/r/type_bit.result
+++ b/mysql-test/r/type_bit.result
@@ -684,4 +684,28 @@ SELECT 1 FROM t1 GROUP BY a;
 1
 1
 DROP TABLE t1;
+CREATE TABLE t1 (b BIT NOT NULL, i2 INTEGER NOT NULL, s VARCHAR(255) NOT NULL);
+INSERT INTO t1 VALUES(0x01,100,''), (0x00,300,''), (0x01,200,''), (0x00,100,'');
+SELECT HEX(b), i2 FROM t1 WHERE (i2>=100 AND i2<201) AND b=TRUE;
+HEX(b)	i2
+1	100
+1	200
+CREATE TABLE t2 (b1 BIT NOT NULL, b2 BIT NOT NULL, i2 INTEGER NOT NULL,
+s VARCHAR(255) NOT NULL);
+INSERT INTO t2 VALUES (0x01,0x00,100,''), (0x00,0x01,300,''),
+(0x01,0x00,200,''), (0x00,0x01,100,'');
+SELECT HEX(b1), i2 FROM t2 WHERE (i2>=100 AND i2<201) AND b1=TRUE;
+HEX(b1)	i2
+1	100
+1	200
+SELECT HEX(b2), i2 FROM t2 WHERE (i2>=100 AND i2<201) AND b2=FALSE;
+HEX(b2)	i2
+0	100
+0	200
+SELECT HEX(b1), HEX(b2), i2 FROM t2
+WHERE (i2>=100 AND i2<201) AND b1=TRUE AND b2=FALSE;
+HEX(b1)	HEX(b2)	i2
+1	0	100
+1	0	200
+DROP TABLE t1, t2;
 End of 5.0 tests
diff --git a/mysql-test/t/type_bit.test b/mysql-test/t/type_bit.test
index 3095311bfbc..6a6b29deda4 100644
--- a/mysql-test/t/type_bit.test
+++ b/mysql-test/t/type_bit.test
@@ -333,4 +333,23 @@ SELECT 1 FROM t1 GROUP BY a;
 
 DROP TABLE t1;
 
+#
+# Bug#37799 SELECT with a BIT column in WHERE clause returns unexpected result
+#
+
+CREATE TABLE t1 (b BIT NOT NULL, i2 INTEGER NOT NULL, s VARCHAR(255) NOT NULL);
+INSERT INTO t1 VALUES(0x01,100,''), (0x00,300,''), (0x01,200,''), (0x00,100,'');
+SELECT HEX(b), i2 FROM t1 WHERE (i2>=100 AND i2<201) AND b=TRUE;
+
+CREATE TABLE t2 (b1 BIT NOT NULL, b2 BIT NOT NULL, i2 INTEGER NOT NULL,
+                 s VARCHAR(255) NOT NULL);
+INSERT INTO t2 VALUES (0x01,0x00,100,''), (0x00,0x01,300,''),
+                      (0x01,0x00,200,''), (0x00,0x01,100,'');
+SELECT HEX(b1), i2 FROM t2 WHERE (i2>=100 AND i2<201) AND b1=TRUE;
+SELECT HEX(b2), i2 FROM t2 WHERE (i2>=100 AND i2<201) AND b2=FALSE;
+SELECT HEX(b1), HEX(b2), i2 FROM t2
+       WHERE (i2>=100 AND i2<201) AND b1=TRUE AND b2=FALSE;
+
+DROP TABLE t1, t2;
+
 --echo End of 5.0 tests
diff --git a/sql/field.h b/sql/field.h
index 241ad61f339..7b2dda77095 100644
--- a/sql/field.h
+++ b/sql/field.h
@@ -138,7 +138,7 @@ public:
   virtual bool eq(Field *field)
   {
     return (ptr == field->ptr && null_ptr == field->null_ptr &&
-            null_bit == field->null_bit);
+            null_bit == field->null_bit && field->type() == type());
   }
   virtual bool eq_def(Field *field);
   
@@ -1489,7 +1489,6 @@ public:
   bool eq(Field *field)
   {
     return (Field::eq(field) &&
-            field->type() == type() &&
             bit_ptr == ((Field_bit *)field)->bit_ptr &&
             bit_ofs == ((Field_bit *)field)->bit_ofs);
   }