diff --git a/include/sniffer.h b/include/sniffer.h
index 9936a9e..99a70fe 100644
--- a/include/sniffer.h
+++ b/include/sniffer.h
@@ -76,7 +76,7 @@ namespace Tins {
              * This constructor is available only in C++11.
              */
             BaseSniffer(BaseSniffer &&rhs) noexcept 
-            : handle(nullptr), mask(), prog()
+            : handle(nullptr), mask()
             {
                 *this = std::move(rhs);
             }
@@ -90,7 +90,6 @@ namespace Tins {
                 using std::swap;
                 swap(handle, rhs.handle);
                 swap(mask, rhs.mask);
-                swap(prog, rhs.prog);
                 return *this;
             }
         #endif
@@ -242,7 +241,6 @@ namespace Tins {
         
         pcap_t *handle;
         bpf_u_int32 mask;
-        bpf_program prog;
     };
     
     /** 
diff --git a/src/sniffer.cpp b/src/sniffer.cpp
index 445bf36..e0d0c9f 100644
--- a/src/sniffer.cpp
+++ b/src/sniffer.cpp
@@ -36,14 +36,12 @@ using std::runtime_error;
 
 namespace Tins {
 BaseSniffer::BaseSniffer() 
-: handle(0), mask(0), prog()
+: handle(0), mask(0)
 {
     
 }
     
 BaseSniffer::~BaseSniffer() {
-    if(prog.bf_insns)
-        pcap_freecode(&prog);
     if(handle)
         pcap_close(handle);
 }
@@ -114,9 +112,11 @@ BaseSniffer::iterator BaseSniffer::end() {
 }
 
 bool BaseSniffer::set_filter(const std::string &filter) {
+    bpf_program prog;
     if(pcap_compile(handle, &prog, filter.c_str(), 0, mask) == -1)
         return false;
     bool result = pcap_setfilter(handle, &prog) != -1;
+    pcap_freecode(&prog);
     return result;
 }