diff --git a/usr.bin/truss/amd64-fbsd32.c b/usr.bin/truss/amd64-fbsd32.c
index ed98a5b85937..7f049a64c6e7 100644
--- a/usr.bin/truss/amd64-fbsd32.c
+++ b/usr.bin/truss/amd64-fbsd32.c
@@ -118,7 +118,7 @@ i386_syscall_entry(struct trussinfo *trussinfo, int nargs) {
   int syscall_num;
   int i;
   unsigned int parm_offset;
-  struct syscall *sc;
+  struct syscall *sc = NULL;
 
   if (fd == -1 || trussinfo->pid != cpid) {
     sprintf(buf, "/proc/%d/regs", trussinfo->pid);
diff --git a/usr.bin/truss/i386-fbsd.c b/usr.bin/truss/i386-fbsd.c
index ed98a5b85937..7f049a64c6e7 100644
--- a/usr.bin/truss/i386-fbsd.c
+++ b/usr.bin/truss/i386-fbsd.c
@@ -118,7 +118,7 @@ i386_syscall_entry(struct trussinfo *trussinfo, int nargs) {
   int syscall_num;
   int i;
   unsigned int parm_offset;
-  struct syscall *sc;
+  struct syscall *sc = NULL;
 
   if (fd == -1 || trussinfo->pid != cpid) {
     sprintf(buf, "/proc/%d/regs", trussinfo->pid);