1 files changed, 5 insertions, 1 deletions

diff --git a/libbb/trim.c b/libbb/trim.c
index 78cf235dd..d3be62d93 100644
--- a/libbb/trim.c
+++ b/libbb/trim.c
@@ -33,7 +33,11 @@
 
 void trim(char *s)
 {
-        int len=strlen(s);
+        int len = strlen(s);
+
+        /* sanity check */
+        if (len == 0)
+                return;
 
         /* trim trailing whitespace */
         while ( len > 0 && isspace(s[len-1]))