diff --git a/ChangeLog b/ChangeLog
index 17fbfc92..71699c79 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,7 @@ August 21, 2007
 + [FOD] Added support for Visual Studio 2005
 * [FOD] Robustified MJ2 codecs
 * [Parvatha] Solved problems with codec reading from image file directory when filename had more than one "." in name
+* [Callum Lerwick] Minor cleanup patch, that gets rid of a bunch of "old style declaration" warnings from Intel's compiler
 
 August 20, 2007
 + [FOD] Added support for the TGA file format in the codec
diff --git a/libopenjpeg/bio.c b/libopenjpeg/bio.c
index 2a305a79..4c02f464 100644
--- a/libopenjpeg/bio.c
+++ b/libopenjpeg/bio.c
@@ -114,7 +114,7 @@ static int bio_getbit(opj_bio_t *bio) {
 ==========================================================
 */
 
-opj_bio_t* bio_create() {
+opj_bio_t* bio_create(void) {
 	opj_bio_t *bio = (opj_bio_t*)opj_malloc(sizeof(opj_bio_t));
 	return bio;
 }
diff --git a/libopenjpeg/bio.h b/libopenjpeg/bio.h
index d0a809c1..764d7cb2 100644
--- a/libopenjpeg/bio.h
+++ b/libopenjpeg/bio.h
@@ -64,7 +64,7 @@ typedef struct opj_bio {
 Create a new BIO handle 
 @return Returns a new BIO handle if successful, returns NULL otherwise
 */
-opj_bio_t* bio_create();
+opj_bio_t* bio_create(void);
 /**
 Destroy a previously created BIO handle
 @param bio BIO handle to destroy
diff --git a/libopenjpeg/image.c b/libopenjpeg/image.c
index 84664e9a..26d2074a 100644
--- a/libopenjpeg/image.c
+++ b/libopenjpeg/image.c
@@ -26,7 +26,7 @@
 
 #include "opj_includes.h"
 
-opj_image_t* opj_image_create0() {
+opj_image_t* opj_image_create0(void) {
 	opj_image_t *image = (opj_image_t*)opj_malloc(sizeof(opj_image_t));
 	return image;
 }
diff --git a/libopenjpeg/image.h b/libopenjpeg/image.h
index b56de4ac..04c362eb 100644
--- a/libopenjpeg/image.h
+++ b/libopenjpeg/image.h
@@ -40,7 +40,7 @@ Create an empty image
 @todo this function should be removed
 @return returns an empty image if successful, returns NULL otherwise
 */
-opj_image_t* opj_image_create0();
+opj_image_t* opj_image_create0(void);
 
 /*@}*/
 
diff --git a/libopenjpeg/j2k_lib.c b/libopenjpeg/j2k_lib.c
index 69444a7b..ac030a29 100644
--- a/libopenjpeg/j2k_lib.c
+++ b/libopenjpeg/j2k_lib.c
@@ -33,7 +33,7 @@
 #endif /* WIN32 */
 #include "opj_includes.h"
 
-double opj_clock() {
+double opj_clock(void) {
 #ifdef WIN32
 	/* WIN32: use QueryPerformance (very accurate) */
     LARGE_INTEGER freq , t ;
diff --git a/libopenjpeg/j2k_lib.h b/libopenjpeg/j2k_lib.h
index 3d1b53c9..0db63c60 100644
--- a/libopenjpeg/j2k_lib.h
+++ b/libopenjpeg/j2k_lib.h
@@ -43,7 +43,7 @@ The functions in J2K_LIB.C are internal utilities mainly used for memory managem
 Difference in successive opj_clock() calls tells you the elapsed time
 @return Returns time in seconds
 */
-double opj_clock();
+double opj_clock(void);
 
 /**
 Allocate a memory block with elements initialized to 0
diff --git a/libopenjpeg/mqc.c b/libopenjpeg/mqc.c
index e6dd0079..a9d54565 100644
--- a/libopenjpeg/mqc.c
+++ b/libopenjpeg/mqc.c
@@ -344,7 +344,7 @@ static void mqc_renormd(opj_mqc_t *mqc) {
 ==========================================================
 */
 
-opj_mqc_t* mqc_create() {
+opj_mqc_t* mqc_create(void) {
 	opj_mqc_t *mqc = (opj_mqc_t*)opj_malloc(sizeof(opj_mqc_t));
 	return mqc;
 }
diff --git a/libopenjpeg/mqc.h b/libopenjpeg/mqc.h
index 67f38c12..a3d44b01 100644
--- a/libopenjpeg/mqc.h
+++ b/libopenjpeg/mqc.h
@@ -79,7 +79,7 @@ typedef struct opj_mqc {
 Create a new MQC handle 
 @return Returns a new MQC handle if successful, returns NULL otherwise
 */
-opj_mqc_t* mqc_create();
+opj_mqc_t* mqc_create(void);
 /**
 Destroy a previously created MQC handle
 @param mqc MQC handle to destroy
diff --git a/libopenjpeg/openjpeg.c b/libopenjpeg/openjpeg.c
index 6f12ff00..f7363b9b 100644
--- a/libopenjpeg/openjpeg.c
+++ b/libopenjpeg/openjpeg.c
@@ -53,7 +53,7 @@ DllMain(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
 /* ---------------------------------------------------------------------- */
 
 
-const char* OPJ_CALLCONV opj_version() {
+const char* OPJ_CALLCONV opj_version(void) {
     return OPENJPEG_VERSION;
 }
 
diff --git a/libopenjpeg/openjpeg.h b/libopenjpeg/openjpeg.h
index c3d765e4..483f8d6b 100644
--- a/libopenjpeg/openjpeg.h
+++ b/libopenjpeg/openjpeg.h
@@ -591,7 +591,7 @@ extern "C" {
 ==========================================================
 */
 
-OPJ_API const char * OPJ_CALLCONV opj_version();
+OPJ_API const char * OPJ_CALLCONV opj_version(void);
 
 /* 
 ==========================================================
diff --git a/libopenjpeg/raw.c b/libopenjpeg/raw.c
index 808a4689..3d231bfd 100644
--- a/libopenjpeg/raw.c
+++ b/libopenjpeg/raw.c
@@ -42,7 +42,7 @@
 ==========================================================
 */
 
-opj_raw_t* raw_create() {
+opj_raw_t* raw_create(void) {
 	opj_raw_t *raw = (opj_raw_t*)opj_malloc(sizeof(opj_raw_t));
 	return raw;
 }
diff --git a/libopenjpeg/raw.h b/libopenjpeg/raw.h
index c4ff9b32..3c4b372f 100644
--- a/libopenjpeg/raw.h
+++ b/libopenjpeg/raw.h
@@ -67,7 +67,7 @@ typedef struct opj_raw {
 Create a new RAW handle 
 @return Returns a new RAW handle if successful, returns NULL otherwise
 */
-opj_raw_t* raw_create();
+opj_raw_t* raw_create(void);
 /**
 Destroy a previously created RAW handle
 @param raw RAW handle to destroy