diff --git a/libr/core/cmd_write.c b/libr/core/cmd_write.c
index b7f154237f..486c9536c1 100644
--- a/libr/core/cmd_write.c
+++ b/libr/core/cmd_write.c
@@ -14,7 +14,7 @@ static const char *help_msg_w[] = {
 	"waF"," f.asm","assemble file and write bytes and show 'wx' op with hexpair bytes of assembled code",
 	"wao","[?] op","modify opcode (change conditional of jump. nop, etc)",
 	"wA","[?] r 0","alter/modify opcode at current seek (see wA?)",
-	"wb"," 010203","fill current block with cyclic hexpairs",
+	"wb"," 011001","write bits in bit big endian",
 	"wB","[-]0xVALUE","set or unset bits with given value",
 	"wc","[?][jir+-*?]","write cache list/undo/commit/reset (io.cache)",
 	"wd"," [off] [n]","duplicate N bytes from offset at current seek (memcpy) (see y?)",
@@ -29,6 +29,7 @@ static const char *help_msg_w[] = {
 	"wt","[?] file [sz]","write to file (from current seek, blocksize or sz bytes)",
 	"ww"," foobar","write wide string 'f\\x00o\\x00o\\x00b\\x00a\\x00r\\x00'",
 	"wx","[?][fs] 9090","write two intel nops (from wxfile or wxseek)",
+	"wX"," 1b2c3d","fill current block with cyclic hexpairs",
 	"wv","[?] eip+34","write 32-64 bit value honoring cfg.bigendian",
 	"wz"," string","write zero terminated string (like w + \\x00)",
 	NULL
@@ -1917,6 +1918,28 @@ repeat:
 }
 
 static int cmd_wb(void *data, const char *input) {
+	RCore *core = (RCore *)data;
+	ut8 b = core->block[0];
+	char *ui = r_str_newf ("%sb", r_str_trim_head_ro (input));
+	int uil = strlen (ui) - 1;
+	int n = r_num_get (NULL, ui);
+	free (ui);
+	if (uil > 8) {
+		eprintf ("wb only operates on bytes\n");
+	} else if (uil > 0) {
+		int shift = 8 - uil;
+		b <<= shift;
+		b >>= shift;
+		b |= (n << shift);
+		r_io_write_at (core->io, core->offset, &b, 1);
+	} else {
+		eprintf ("Usage: wb 010101 (see pb)\n");
+	}
+
+	return 0;
+}
+
+static int cmd_wX(void *data, const char *input) {
 	RCore *core = (RCore *)data;
 	size_t len = strlen (input);
 	const size_t buf_size = len + 2;
@@ -2091,6 +2114,9 @@ static int cmd_write(void *data, const char *input) {
 	case 'b': // "wb"
 		cmd_wb (core, input + 1);
 		break;
+	case 'X': // "wX"
+		cmd_wX (core, input + 1);
+		break;
 	case 'B': // "wB"
 		cmd_wB (data, input + 1);
 		break;
diff --git a/test/db/cmd/0000 b/test/db/cmd/0000
index 547146c576..e4604aee03 100644
--- a/test/db/cmd/0000
+++ b/test/db/cmd/0000
@@ -5,7 +5,7 @@ CMDS=<<EOF
 s 0
 e io.va=true
 b 64
-wb 33
+wX 33
 S 0 0x1000 64 64 test
 s 0x1000
 px 0x40
diff --git a/test/db/cmd/archs b/test/db/cmd/archs
index 9d2ec3e570..ea3d01609b 100644
--- a/test/db/cmd/archs
+++ b/test/db/cmd/archs
@@ -102,7 +102,7 @@ RUN
 NAME=tests: ppcps
 FILE=malloc://256
 CMDS=<<EOF
-wb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
+w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
 e asm.arch=ppc
 e cfg.bigendian = true
 e asm.cpu=ps
diff --git a/test/db/cmd/cmd_pf b/test/db/cmd/cmd_pf
index 57813f4a26..5d04ce3beb 100644
--- a/test/db/cmd/cmd_pf
+++ b/test/db/cmd/cmd_pf
@@ -832,7 +832,7 @@ BROKEN=1
 FILE=malloc://1024
 CMDS=<<EOF
 e cfg.bigendian=true
-wb 4142434431323334
+wX 4142434431323334
 "td enum ascii{ LETTER_A=0x41, LETTER_D=0x44, DIGIT_1=0x31, DIGIT_4=0x34}"
 pf.somestring [1]E[1]E[1]E[1]E[1]E[1]E[1]E[1]E (ascii)B1 (ascii)B2 (ascii)B3 (ascii)B4 (ascii)B5 (ascii)B6 (ascii)B7 (ascii)B8
 pf.somestring
diff --git a/test/db/cmd/cmd_print_bitformat b/test/db/cmd/cmd_print_bitformat
index 6279ce31bf..44c16869d3 100644
--- a/test/db/cmd/cmd_print_bitformat
+++ b/test/db/cmd/cmd_print_bitformat
@@ -41,3 +41,22 @@ V\__/\______________________________________________________________/
 EOF
 RUN
 
+NAME=pbwb
+FILE=-
+CMDS=<<EOF
+pb 8
+wb 110
+pb 8
+wb 0001
+pb 8
+wb 1010001
+pb 8
+EOF
+EXPECT=<<EOF
+00000000
+11000000
+00010000
+10110010
+EOF
+RUN
+
diff --git a/test/db/cmd/cmd_seek b/test/db/cmd/cmd_seek
index 7273de6bf8..e2a64b4ea7 100644
--- a/test/db/cmd/cmd_seek
+++ b/test/db/cmd/cmd_seek
@@ -208,9 +208,9 @@ FILE=malloc://0x4000
 CMDS=<<EOF
 s 0
 b 64
-wb 38
+wX 38
 s 64
-wb deadbeef
+wX deadbeef
 s-32
 px
 EOF
diff --git a/test/db/cmd/cmd_w b/test/db/cmd/cmd_w
index 717198cdc0..cc8745b6bf 100644
--- a/test/db/cmd/cmd_w
+++ b/test/db/cmd/cmd_w
@@ -328,10 +328,10 @@ nop
 EOF
 RUN
 
-NAME=wb
+NAME=wX
 FILE=-
 CMDS=<<EOF
-wb 0102 @!20
+wX 0102 @!20
 p8 20
 EOF
 EXPECT=<<EOF
@@ -343,7 +343,7 @@ NAME=wm
 FILE=-
 CMDS=<<EOF
 wm f0ff
-wb 010203 @!20
+wX 010203 @!20
 p8 20
 EOF
 EXPECT=<<EOF
diff --git a/test/db/esil/arm_16 b/test/db/esil/arm_16
index 446cc78663..3dfe7fdd7a 100644
--- a/test/db/esil/arm_16
+++ b/test/db/esil/arm_16
@@ -1192,7 +1192,7 @@ FILE=malloc://0x200
 CMDS=<<EOF
 e asm.arch=arm
 e asm.bits=16
-wb 054b
+wX 054b
 pd 10
 EOF
 EXPECT=<<EOF