diff --git a/client/Makefile b/client/Makefile
index 903cbf9e..0972f441 100644
--- a/client/Makefile
+++ b/client/Makefile
@@ -98,6 +98,7 @@ CMDSRCS = 	nonce2key/crapto1.c\
 			cmdmain.c \
 			cmdlft55xx.c \
 			cmdlfpcf7931.c\
+			cmdlfviking.c\
 			pm3_binlib.c\
 			scripting.c\
 			cmdscript.c\
diff --git a/client/cmdlf.c b/client/cmdlf.c
index 467816aa..41feec20 100644
--- a/client/cmdlf.c
+++ b/client/cmdlf.c
@@ -29,6 +29,7 @@
 #include "cmdlft55xx.h"
 #include "cmdlfpcf7931.h"
 #include "cmdlfio.h"
+#include "cmdlfviking.h"
 #include "lfdemod.h"
 
 static int CmdHelp(const char *Cmd);
@@ -1213,14 +1214,15 @@ int CmdLFfind(const char *Cmd)
 static command_t CommandTable[] = 
 {
 	{"help",        CmdHelp,            1, "This help"},
-	{"awid",        CmdLFAWID,          1, "{ AWID RFIDs... }"},
-	{"em4x",        CmdLFEM4X,          1, "{ EM4X RFIDs... }"},
-	{"hid",         CmdLFHID,           1, "{ HID RFIDs... }"},
+	{"awid",        CmdLFAWID,          1, "{ AWID RFIDs...    }"},
+	{"em4x",        CmdLFEM4X,          1, "{ EM4X RFIDs...    }"},
+	{"hid",         CmdLFHID,           1, "{ HID RFIDs...     }"},
 	{"hitag",       CmdLFHitag,         1, "{ Hitag tags and transponders... }"},
-	{"io",          CmdLFIO,            1, "{ ioProx tags... }"},
+	{"io",          CmdLFIO,            1, "{ ioProx tags...   }"},
 	{"pcf7931",     CmdLFPCF7931,       1, "{ PCF7931 RFIDs... }"},
-	{"t55xx",       CmdLFT55XX,         1, "{ T55xx RFIDs... }"},
-	{"ti",          CmdLFTI,            1, "{ TI RFIDs... }"},
+	{"t55xx",       CmdLFT55XX,         1, "{ T55xx RFIDs...   }"},
+	{"ti",          CmdLFTI,            1, "{ TI RFIDs...      }"},
+	{"viking",      CmdLFViking,        1, "{ Viking tags...   }"},
 	{"cmdread",     CmdLFCommandRead,   0, "<d period> <z period> <o period> <c command> ['H'] -- Modulate LF reader field to send command before read (all periods in microseconds) (option 'H' for 134)"},
 	{"config",      CmdLFSetConfig,     0, "Set config for LF sampling, bit/sample, decimation, frequency"},
 	{"flexdemod",   CmdFlexdemod,       1, "Demodulate samples for FlexPass"},
diff --git a/client/cmdlfviking.c b/client/cmdlfviking.c
index 551718e4..e43a9748 100644
--- a/client/cmdlfviking.c
+++ b/client/cmdlfviking.c
@@ -48,7 +48,7 @@ int usage_lf_viking_sim(void) {
 uint64_t getVikingBits(uint32_t id) {
 	//calc checksum
 	uint8_t checksum = (id>>24) ^ ((id>>16) & 0xFF) ^ ((id>>8) & 0xFF) ^ (id & 0xFF) ^ 0xF2 ^ 0xA8;
-	return (0xF2 << 56) | (id << 8) | checksum;
+	return ((uint64_t)0xF2 << 56) | (id << 8) | checksum;
 }
 //by marshmellow
 //see ASKDemod for what args are accepted
@@ -68,7 +68,7 @@ int CmdVikingClone(const char *Cmd) {
 	char cmdp = param_getchar(Cmd, 0);
 	if (strlen(Cmd) < 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_clone();
 
-	id = param_get32ex(Cmd, 0, 0, 16)
+	id = param_get32ex(Cmd, 0, 0, 16);
 	if (id == 0) return usage_lf_viking_clone();
 	if (param_getchar(Cmd, 1)=='Q' || param_getchar(Cmd, 1)=='q')
 		Q5 = true;
@@ -87,9 +87,10 @@ int CmdVikingSim(const char *Cmd) {
 	uint32_t id = 0;
 	uint64_t rawID = 0;
 	uint8_t clk = 32, encoding = 1, separator = 0, invert = 0;
+	char cmdp = param_getchar(Cmd, 0);
 
 	if (strlen(Cmd) < 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_sim();
-	id = param_get32ex(Cmd, 0, 0, 16)
+	id = param_get32ex(Cmd, 0, 0, 16);
 	if (id == 0) return usage_lf_viking_sim();
 
 	rawID = getVikingBits(id);
@@ -104,6 +105,7 @@ int CmdVikingSim(const char *Cmd) {
   num_to_bytebits(rawID, 64, c.d.asBytes);
 	clearCommandBuffer();
   SendCommand(&c);
+  return 0;
 }
 
 static command_t CommandTable[] = {
diff --git a/client/cmdlfviking.h b/client/cmdlfviking.h
index fe4f522c..2e8ac479 100644
--- a/client/cmdlfviking.h
+++ b/client/cmdlfviking.h
@@ -11,6 +11,6 @@
 int CmdLFViking(const char *Cmd);
 int CmdVikingRead(const char *Cmd);
 int CmdVikingClone(const char *Cmd);
-int CmdVikingSim(static char *Cmd);
+int CmdVikingSim(const char *Cmd);
 #endif