diff --git a/src/decode-gre.c b/src/decode-gre.c
index 4eecb35b515c..058c529b8519 100644
--- a/src/decode-gre.c
+++ b/src/decode-gre.c
@@ -66,7 +66,7 @@ int DecodeGRE(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, const uint8_t *p
     {
         case GRE_VERSION_0:
 
-            /* GRE version 0 doenst support the fields below RFC 1701 */
+            /* GRE version 0 doesn't support the fields below RFC 1701 */
 
             /**
              * \todo We need to make sure this does not allow bypassing
@@ -130,7 +130,7 @@ int DecodeGRE(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, const uint8_t *p
 
         case GRE_VERSION_1:
 
-            /* GRE version 1 doenst support the fields below RFC 1701 */
+            /* GRE version 1 doesn't support the fields below RFC 1701 */
 
             /**
              * \todo We need to make sure this does not allow bypassing
diff --git a/src/decode.c b/src/decode.c
index c675449db16a..f406bb42f70e 100644
--- a/src/decode.c
+++ b/src/decode.c
@@ -28,7 +28,7 @@
  * example we have DecodeIPV4() for IPv4 and DecodePPP() for
  * PPP.
  *
- * These functions have all a pkt and and a len argument which
+ * These functions have all a pkt and a len argument which
  * are respectively a pointer to the protocol data and the length
  * of this protocol data.
  *
@@ -112,7 +112,7 @@ void PacketFree(Packet *p)
  * \brief Finalize decoding of a packet
  *
  * This function needs to be call at the end of decode
- * functions when decoding has been succesful.
+ * functions when decoding has been successful.
  *
  */
 void PacketDecodeFinalize(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p)
@@ -288,7 +288,7 @@ Packet *PacketTunnelPktSetup(ThreadVars *tv, DecodeThreadVars *dtv, Packet *pare
         SCReturnPtr(NULL, "Packet");
     }
 
-    /* copy packet and set lenght, proto */
+    /* copy packet and set length, proto */
     PacketCopyData(p, pkt, len);
     p->recursion_level = parent->recursion_level + 1;
     p->ts.tv_sec = parent->ts.tv_sec;
@@ -385,7 +385,7 @@ Packet *PacketDefragPktSetup(Packet *parent, const uint8_t *pkt, uint32_t len, u
 
 /**
  *  \brief inform defrag "parent" that a pseudo packet is
- *         now assosiated to it.
+ *         now associated to it.
  */
 void PacketDefragPktSetupParent(Packet *parent)
 {
@@ -647,7 +647,7 @@ void DecodeThreadVarsFree(ThreadVars *tv, DecodeThreadVars *dtv)
 }
 
 /**
- * \brief Set data for Packet and set length when zeo copy is used
+ * \brief Set data for Packet and set length when zero copy is used
  *
  *  \param Pointer to the Packet to modify
  *  \param Pointer to the data
diff --git a/src/decode.h b/src/decode.h
index 82d23089acac..4e2ecf0e5933 100644
--- a/src/decode.h
+++ b/src/decode.h
@@ -161,7 +161,7 @@ typedef struct Address_ {
         (a)->addr_data32[3] = 0; \
     } while (0)
 
-/* Set the IPv6 addressesinto the Addrs of the Packet.
+/* Set the IPv6 addresses into the Addrs of the Packet.
  * Make sure p->ip6h is initialized and validated. */
 #define SET_IPV6_SRC_ADDR(p, a) do {                    \
         (a)->family = AF_INET6;                         \
@@ -386,7 +386,7 @@ typedef struct PktProfiling_ {
 
 #endif /* PROFILING */
 
-/* forward declartion since Packet struct definition requires this */
+/* forward declaration since Packet struct definition requires this */
 struct PacketQueue_;
 
 /* sizes of the members:
@@ -1080,7 +1080,7 @@ void DecodeUnregisterCounters(void);
 #define PKT_ALLOC                       (1<<3)      /**< Packet was alloc'd this run, needs to be freed */
 #define PKT_HAS_TAG                     (1<<4)      /**< Packet has matched a tag */
 #define PKT_STREAM_ADD                  (1<<5)      /**< Packet payload was added to reassembled stream */
-#define PKT_STREAM_EST                  (1<<6)      /**< Packet is part of establised stream */
+#define PKT_STREAM_EST                  (1<<6)      /**< Packet is part of established stream */
 #define PKT_STREAM_EOF                  (1<<7)      /**< Stream is in eof state */
 #define PKT_HAS_FLOW                    (1<<8)
 #define PKT_PSEUDO_STREAM_END           (1<<9)      /**< Pseudo packet to end the stream */