diff --git a/src/mempool.c b/src/mempool.c
index 0acbabb..41853bd 100755
--- a/src/mempool.c
+++ b/src/mempool.c
@@ -88,7 +88,7 @@ static alloc_hdr_t * AllocHdr()
 **  Returns pointer to the new pool.
 */
 
-alloc_handle_t * AllocInit()
+DLLEXPORT alloc_handle_t * AllocInit()
 {
     alloc_handle_t *newpool;
 
@@ -108,7 +108,7 @@ alloc_handle_t * AllocInit()
 **  memory from the current pool.
 */
 
-char * Alloc(long size)
+DLLEXPORT char *Alloc(long size)
 {
     alloc_hdr_t  *hdr = root->current;
     char         *ptr;
@@ -158,7 +158,7 @@ char * Alloc(long size)
 **  Change the current pool.  Return the old pool.
 */
 
-alloc_handle_t * AllocSetPool(alloc_handle_t *newpool)
+DLLEXPORT alloc_handle_t * AllocSetPool(alloc_handle_t *newpool)
 {
     alloc_handle_t *old = (alloc_handle_t *) root;
     root = (alloc_root_t *) newpool;
@@ -173,7 +173,7 @@ alloc_handle_t * AllocSetPool(alloc_handle_t *newpool)
 **  so this is very fast.
 */
 
-void  AllocReset()
+DLLEXPORT void AllocReset()
 {
     root->current = root->first;
     root->current->free = root->current->block;
@@ -187,7 +187,7 @@ void  AllocReset()
 **  Don't use where AllocReset() could be used.
 */
 
-void  AllocFreePool()
+DLLEXPORT void AllocFreePool()
 {
     alloc_hdr_t  *tmp,
                  *hdr = root->first;
diff --git a/src/mempool.h b/src/mempool.h
index 1c4dfc7..2e43dde 100755
--- a/src/mempool.h
+++ b/src/mempool.h
@@ -6,14 +6,31 @@
 **  The type alloc_handle_t provides an opaque reference to the
 **  alloc pool - only the alloc routines know its structure.
 */
+#ifndef DLLEXPORT
+  #ifdef DLL
+    #ifdef __cplusplus
+    #define DLLEXPORT extern "C" __declspec(dllexport)
+    #else
+    #define DLLEXPORT __declspec(dllexport)
+    #endif
+  #elif defined(CYGWIN)
+    #define DLLEXPORT __stdcall
+  #else
+    #ifdef __cplusplus
+    #define DLLEXPORT
+    #else
+    #define DLLEXPORT
+    #endif
+  #endif
+#endif
 
 typedef struct
 {
    long  dummy;
 }  alloc_handle_t;
 
-alloc_handle_t *AllocInit(void);
-char           *Alloc(long);
-alloc_handle_t *AllocSetPool(alloc_handle_t *);
-void            AllocReset(void);
-void            AllocFreePool(void);
+DLLEXPORT alloc_handle_t *AllocInit(void);
+DLLEXPORT char           *Alloc(long);
+DLLEXPORT alloc_handle_t *AllocSetPool(alloc_handle_t *);
+DLLEXPORT void            AllocReset(void);
+DLLEXPORT void            AllocFreePool(void);