diff --git a/arch/mips/fw/arc/cmdline.c b/arch/mips/fw/arc/cmdline.c
index fd604ef28823ccf9113670c7377f53fc0c8a1a22..4ca4eef934a539aa579458c37c95e4826356ab44 100644
--- a/arch/mips/fw/arc/cmdline.c
+++ b/arch/mips/fw/arc/cmdline.c
@@ -52,7 +52,7 @@ static char * __init move_firmware_args(char* cp)
 				strcat(cp, used_arc[i][1]);
 				cp += strlen(used_arc[i][1]);
 				/* ... and now the argument */
-				s = strstr(prom_argv(actr), "=");
+				s = strchr(prom_argv(actr), '=');
 				if (s) {
 					s++;
 					strcpy(cp, s);