diff --git a/ChangeLog b/ChangeLog
index c33b1e74..717afe39 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -108,6 +108,8 @@ Changes in current version:
  o change failing behavior of event_base_new_with_config: if a config is provided and no backend is selected, return NULL instead of aborting.
  o deliver partial data to request callbacks when chunked callback is set even if there is no chunking on the http level; allows cancelation of requests from within the chunked callback; from Scott Lamb.
  o allow min_heap_erase to be called on removed members; from liusifan.
+ o Rename INPUT and OUTPUT to EVRPC_INPUT and EVRPC_OUTPUT.  Retain INPUT/OUTPUT aliases on on-win32 platforms for backwards compatibility.
+
 
 Changes in 1.4.0:
  o allow \r or \n individually to separate HTTP headers instead of the standard "\r\n"; from Charles Kerr.
diff --git a/evrpc.c b/evrpc.c
index 0add4fe3..fd3b93f0 100644
--- a/evrpc.c
+++ b/evrpc.c
@@ -97,10 +97,10 @@ evrpc_free(struct evrpc_base *base)
 		assert(evrpc_unregister_rpc(base, rpc->uri));
 	}
 	while ((hook = TAILQ_FIRST(&base->input_hooks)) != NULL) {
-		assert(evrpc_remove_hook(base, INPUT, hook));
+		assert(evrpc_remove_hook(base, EVRPC_INPUT, hook));
 	}
 	while ((hook = TAILQ_FIRST(&base->output_hooks)) != NULL) {
-		assert(evrpc_remove_hook(base, OUTPUT, hook));
+		assert(evrpc_remove_hook(base, EVRPC_OUTPUT, hook));
 	}
 	mm_free(base);
 }
@@ -115,14 +115,14 @@ evrpc_add_hook(void *vbase,
 	struct evrpc_hook_list *head = NULL;
 	struct evrpc_hook *hook = NULL;
 	switch (hook_type) {
-	case INPUT:
+	case EVRPC_INPUT:
 		head = &base->in_hooks;
 		break;
-	case OUTPUT:
+	case EVRPC_OUTPUT:
 		head = &base->out_hooks;
 		break;
 	default:
-		assert(hook_type == INPUT || hook_type == OUTPUT);
+		assert(hook_type == EVRPC_INPUT || hook_type == EVRPC_OUTPUT);
 	}
 
 	hook = mm_calloc(1, sizeof(struct evrpc_hook));
@@ -160,14 +160,14 @@ evrpc_remove_hook(void *vbase, enum EVRPC_HOOK_TYPE hook_type, void *handle)
 	struct _evrpc_hooks *base = vbase;
 	struct evrpc_hook_list *head = NULL;
 	switch (hook_type) {
-	case INPUT:
+	case EVRPC_INPUT:
 		head = &base->in_hooks;
 		break;
-	case OUTPUT:
+	case EVRPC_OUTPUT:
 		head = &base->out_hooks;
 		break;
 	default:
-		assert(hook_type == INPUT || hook_type == OUTPUT);
+		assert(hook_type == EVRPC_INPUT || hook_type == EVRPC_OUTPUT);
 	}
 
 	return (evrpc_remove_hook_internal(head, handle));
@@ -525,11 +525,11 @@ evrpc_pool_free(struct evrpc_pool *pool)
 	}
 
 	while ((hook = TAILQ_FIRST(&pool->input_hooks)) != NULL) {
-		assert(evrpc_remove_hook(pool, INPUT, hook));
+		assert(evrpc_remove_hook(pool, EVRPC_INPUT, hook));
 	}
 
 	while ((hook = TAILQ_FIRST(&pool->output_hooks)) != NULL) {
-		assert(evrpc_remove_hook(pool, OUTPUT, hook));
+		assert(evrpc_remove_hook(pool, EVRPC_OUTPUT, hook));
 	}
 
 	mm_free(pool);
diff --git a/evrpc.h b/evrpc.h
index 68aba172..5b52bb8e 100644
--- a/evrpc.h
+++ b/evrpc.h
@@ -429,10 +429,19 @@ void evrpc_pool_set_timeout(struct evrpc_pool *pool, int timeout_in_secs);
  */
 
 enum EVRPC_HOOK_TYPE {
-	INPUT,		/**< apply the function to an input hook */
-	OUTPUT		/**< apply the function to an output hook */
+	EVRPC_INPUT,		/**< apply the function to an input hook */
+	EVRPC_OUTPUT		/**< apply the function to an output hook */
 };
 
+#ifndef WIN32
+/** Deprecated alias for EVRPC_INPUT.  Not available on windows, where it
+ * conflicts with platform headers. */
+#define INPUT EVRPC_INPUT
+/** Deprecated alias for EVRPC_OUTPUT.  Not available on windows, where it
+ * conflicts with platform headers. */
+#define OUTPUT EVRPC_OUTPUT
+#endif
+
 /**
  * Return value from hook processing functions
  */
diff --git a/test/regress_rpc.c b/test/regress_rpc.c
index d256725e..acbd83b2 100644
--- a/test/regress_rpc.c
+++ b/test/regress_rpc.c
@@ -474,15 +474,15 @@ rpc_basic_client(void)
 	need_input_hook = 1;
 	need_output_hook = 1;
 
-	assert(evrpc_add_hook(base, INPUT, rpc_hook_add_header, (void*)"input")
+	assert(evrpc_add_hook(base, EVRPC_INPUT, rpc_hook_add_header, (void*)"input")
 	    != NULL);
-	assert(evrpc_add_hook(base, OUTPUT, rpc_hook_add_header, (void*)"output")
+	assert(evrpc_add_hook(base, EVRPC_OUTPUT, rpc_hook_add_header, (void*)"output")
 	    != NULL);
 
 	pool = rpc_pool_with_connection(port);
 
-	assert(evrpc_add_hook(pool, OUTPUT, rpc_hook_add_meta, NULL));
-	assert(evrpc_add_hook(pool, INPUT, rpc_hook_remove_header, (void*)"output"));
+	assert(evrpc_add_hook(pool, EVRPC_OUTPUT, rpc_hook_add_meta, NULL));
+	assert(evrpc_add_hook(pool, EVRPC_INPUT, rpc_hook_remove_header, (void*)"output"));
 
 	/* set up the basic message */
 	msg = msg_new();
@@ -662,13 +662,13 @@ rpc_basic_client_with_pause(void)
 
 	rpc_setup(&http, &port, &base);
 
-	assert(evrpc_add_hook(base, INPUT, rpc_hook_pause, base));
-	assert(evrpc_add_hook(base, OUTPUT, rpc_hook_pause, base));
+	assert(evrpc_add_hook(base, EVRPC_INPUT, rpc_hook_pause, base));
+	assert(evrpc_add_hook(base, EVRPC_OUTPUT, rpc_hook_pause, base));
 
 	pool = rpc_pool_with_connection(port);
 
-	assert(evrpc_add_hook(pool, INPUT, rpc_hook_pause, pool));
-	assert(evrpc_add_hook(pool, OUTPUT, rpc_hook_pause, pool));
+	assert(evrpc_add_hook(pool, EVRPC_INPUT, rpc_hook_pause, pool));
+	assert(evrpc_add_hook(pool, EVRPC_OUTPUT, rpc_hook_pause, pool));
 
 	/* set up the basic message */
 	msg = msg_new();