diff --git a/epan/tvbuff-int.h b/epan/tvbuff-int.h
index e828af7647..e57d176528 100644
--- a/epan/tvbuff-int.h
+++ b/epan/tvbuff-int.h
@@ -29,7 +29,7 @@
 struct tvbuff;
 
 struct tvb_ops {
-	gsize (*tvb_size)(void);
+	gsize tvb_size;
 	void (*tvb_free)(struct tvbuff *tvb);
 	guint (*tvb_offset)(const struct tvbuff *tvb, guint counter);
 	const guint8 *(*tvb_get_ptr)(struct tvbuff *tvb, guint abs_offset, guint abs_length);
diff --git a/epan/tvbuff.c b/epan/tvbuff.c
index ccda1a4832..34f49923e6 100644
--- a/epan/tvbuff.c
+++ b/epan/tvbuff.c
@@ -51,10 +51,6 @@
 #include "charsets.h"
 #include "proto.h"	/* XXX - only used for DISSECTOR_ASSERT, probably a new header file? */
 
-static const guint8*
-ensure_contiguous_no_exception(tvbuff_t *tvb, const gint offset, const gint length,
-		int *pexception);
-
 static guint64
 _tvb_get_bits64(tvbuff_t *tvb, guint bit_offset, const gint total_no_of_bits);
 
@@ -62,7 +58,7 @@ tvbuff_t *
 tvb_new(const struct tvb_ops *ops)
 {
 	tvbuff_t *tvb;
-	gsize     size = (ops->tvb_size) ? ops->tvb_size() : sizeof(*tvb);
+	gsize     size = ops->tvb_size ? ops->tvb_size : sizeof(*tvb);
 
 	g_assert(size >= sizeof(*tvb));
 
@@ -92,7 +88,7 @@ tvb_free_internal(tvbuff_t *tvb)
 	if (tvb->ops->tvb_free)
 		tvb->ops->tvb_free(tvb);
 
-	size = (tvb->ops->tvb_size) ? tvb->ops->tvb_size() : sizeof(*tvb);
+	size = (tvb->ops->tvb_size) ? tvb->ops->tvb_size : sizeof(*tvb);
 
 	g_slice_free1(size, tvb);
 }
@@ -633,7 +629,6 @@ ensure_contiguous_no_exception(tvbuff_t *tvb, const gint offset, const gint leng
 	if (tvb->real_data)
 		return tvb->real_data + abs_offset;
 
-
 	if (tvb->ops->tvb_get_ptr)
 		return tvb->ops->tvb_get_ptr(tvb, abs_offset, abs_length);
 
diff --git a/epan/tvbuff_composite.c b/epan/tvbuff_composite.c
index ade37b1025..b02919238d 100644
--- a/epan/tvbuff_composite.c
+++ b/epan/tvbuff_composite.c
@@ -46,12 +46,6 @@ struct tvb_composite {
 	tvb_comp_t	composite;
 };
 
-static gsize
-composite_sizeof(void)
-{
-	return sizeof(struct tvb_composite);
-}
-
 static void
 composite_free(tvbuff_t *tvb)
 {
@@ -183,7 +177,8 @@ composite_memcpy(tvbuff_t *tvb, void* _target, guint abs_offset, guint abs_lengt
 }
 
 static const struct tvb_ops tvb_composite_ops = {
-	composite_sizeof,     /* size */
+	sizeof(struct tvb_composite), /* size */
+
 	composite_free,       /* free */
 	composite_offset,     /* offset */
 	composite_get_ptr,    /* get_ptr */
diff --git a/epan/tvbuff_real.c b/epan/tvbuff_real.c
index e6b94463eb..e3368beba0 100644
--- a/epan/tvbuff_real.c
+++ b/epan/tvbuff_real.c
@@ -36,12 +36,6 @@ struct tvb_real {
 	tvbuff_free_cb_t	free_cb;
 };
 
-static gsize 
-real_sizeof(void)
-{ 
-	return sizeof(struct tvb_real);
-}
-
 static void
 real_free(tvbuff_t *tvb)
 {
@@ -62,7 +56,8 @@ real_offset(const tvbuff_t *tvb _U_, const guint counter)
 }
 
 static const struct tvb_ops tvb_real_ops = {
-	real_sizeof,          /* size */
+	sizeof(struct tvb_real), /* size */
+
 	real_free,            /* free */
 	real_offset,          /* offset */
 	NULL,                 /* get_ptr */
diff --git a/epan/tvbuff_subset.c b/epan/tvbuff_subset.c
index b5034b3f12..806b2ac44e 100644
--- a/epan/tvbuff_subset.c
+++ b/epan/tvbuff_subset.c
@@ -46,12 +46,6 @@ struct tvb_subset {
 	tvb_backing_t	subset;
 };
 
-static gsize 
-subset_sizeof(void)
-{
-	return sizeof(struct tvb_subset);
-}
-
 static guint
 subset_offset(const tvbuff_t *tvb, const guint counter)
 {
@@ -102,7 +96,8 @@ subset_clone(tvbuff_t *tvb, guint abs_offset, guint abs_length)
 }
 
 static const struct tvb_ops tvb_subset_ops = {
-	subset_sizeof,        /* size */
+	sizeof(struct tvb_subset), /* size */
+
 	NULL,                 /* free */
 	subset_offset,        /* offset */
 	subset_get_ptr,       /* get_ptr */
diff --git a/frame_tvbuff.c b/frame_tvbuff.c
index 27db55765e..b6d4545113 100644
--- a/frame_tvbuff.c
+++ b/frame_tvbuff.c
@@ -143,12 +143,6 @@ frame_pbrk_guint8(tvbuff_t *tvb, guint abs_offset, guint limit, const guint8 *ne
 	return tvb_pbrk_guint8(tvb, abs_offset, limit, needles, found_needle);
 }
 
-static gsize
-frame_sizeof(void)
-{
-	return sizeof(struct tvb_frame);
-}
-
 static guint
 frame_offset(const tvbuff_t *tvb _U_, const guint counter)
 {
@@ -159,7 +153,8 @@ frame_offset(const tvbuff_t *tvb _U_, const guint counter)
 static tvbuff_t *frame_clone(tvbuff_t *tvb, guint abs_offset, guint abs_length);
 
 static const struct tvb_ops tvb_frame_ops = {
-	frame_sizeof,         /* size */
+	sizeof(struct tvb_frame), /* size */
+
 	frame_free,           /* free */
 	frame_offset,         /* offset */
 	frame_get_ptr,        /* get_ptr */