Added missing check

1 files changed, 4 insertions, 2 deletions

diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c
index 732c1b6ec..cb30f5178 100644
--- a/src/lib/ndpi_main.c
+++ b/src/lib/ndpi_main.c
@@ -136,8 +136,10 @@ void *ndpi_realloc(void *ptr, size_t old_size, size_t new_size) {
   if(!ret)
     return(ret);
   else {
-    memcpy(ret, ptr, old_size);
-    ndpi_free(ptr);
+    if(ptr != NULL) {
+      memcpy(ret, ptr, old_size);
+      ndpi_free(ptr);
+    }
     return(ret);
   }
 }