diff --git a/client/cmdhfmf.c b/client/cmdhfmf.c
index 1519c2019..901ccd492 100644
--- a/client/cmdhfmf.c
+++ b/client/cmdhfmf.c
@@ -1607,7 +1607,7 @@ int CmdHF14AMfEKeyPrn(const char *Cmd)
 
 	char cmdp = param_getchar(Cmd, 0);
 	
-	switch (ctmp) {
+	switch (cmdp) {
 		case '0' : numSectors = 5; break;
 		case '1' : 
 		case '\0': numSectors = 16; break;