diff --git a/include/vkd3d.h b/include/vkd3d.h
index 5e814217..3ea591ad 100644
--- a/include/vkd3d.h
+++ b/include/vkd3d.h
@@ -25,12 +25,13 @@
 
 #include "vkd3d_windows.h"
 #include "d3d12.h"
+#include <stdbool.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif  /* __cplusplus */
 
-typedef BOOL (*vkd3d_signal_event_pfn)(HANDLE event);
+typedef bool (*vkd3d_signal_event_pfn)(HANDLE event);
 
 struct vkd3d_device_create_info
 {
diff --git a/include/vkd3d_utils.h b/include/vkd3d_utils.h
index d7112f26..d2e062f7 100644
--- a/include/vkd3d_utils.h
+++ b/include/vkd3d_utils.h
@@ -23,7 +23,7 @@
 #ifndef __VKD3D_UTILS_H
 #define __VKD3D_UTILS_H
 
-#include "vkd3d.h"
+#include <stdbool.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -35,7 +35,7 @@ extern "C" {
 #define INFINITE (~0u)
 
 HANDLE vkd3d_create_event(void);
-BOOL vkd3d_signal_event(HANDLE event);
+bool vkd3d_signal_event(HANDLE event);
 unsigned int vkd3d_wait_event(HANDLE event, unsigned int milliseconds);
 void vkd3d_destroy_event(HANDLE event);
 
diff --git a/libs/vkd3d-utils/vkd3d_utils_main.c b/libs/vkd3d-utils/vkd3d_utils_main.c
index 764c633d..af654315 100644
--- a/libs/vkd3d-utils/vkd3d_utils_main.c
+++ b/libs/vkd3d-utils/vkd3d_utils_main.c
@@ -71,7 +71,7 @@ HANDLE vkd3d_create_event(void)
         return NULL;
     }
 
-    event->is_signaled = FALSE;
+    event->is_signaled = false;
 
     TRACE("Created event %p.\n", event);
 
@@ -93,8 +93,8 @@ unsigned int vkd3d_wait_event(HANDLE event, unsigned int milliseconds)
 
     if (impl->is_signaled || !milliseconds)
     {
-        BOOL is_signaled = impl->is_signaled;
-        impl->is_signaled = FALSE;
+        bool is_signaled = impl->is_signaled;
+        impl->is_signaled = false;
         pthread_mutex_unlock(&impl->mutex);
         return is_signaled ? WAIT_OBJECT_0 : WAIT_TIMEOUT;
     }
@@ -111,7 +111,7 @@ unsigned int vkd3d_wait_event(HANDLE event, unsigned int milliseconds)
             }
         } while (!impl->is_signaled);
 
-        impl->is_signaled = FALSE;
+        impl->is_signaled = false;
         pthread_mutex_unlock(&impl->mutex);
         return WAIT_OBJECT_0;
     }
@@ -121,7 +121,7 @@ unsigned int vkd3d_wait_event(HANDLE event, unsigned int milliseconds)
     return WAIT_FAILED;
 }
 
-BOOL vkd3d_signal_event(HANDLE event)
+bool vkd3d_signal_event(HANDLE event)
 {
     struct vkd3d_event *impl = event;
     int rc;
@@ -131,13 +131,13 @@ BOOL vkd3d_signal_event(HANDLE event)
     if ((rc = pthread_mutex_lock(&impl->mutex)))
     {
         ERR("Failed to lock mutex, error %d.\n", rc);
-        return FALSE;
+        return false;
     }
-    impl->is_signaled = TRUE;
+    impl->is_signaled = true;
     pthread_cond_signal(&impl->cond);
     pthread_mutex_unlock(&impl->mutex);
 
-    return TRUE;
+    return true;
 }
 
 void vkd3d_destroy_event(HANDLE event)
diff --git a/libs/vkd3d-utils/vkd3d_utils_private.h b/libs/vkd3d-utils/vkd3d_utils_private.h
index 5fd90413..5269e7fc 100644
--- a/libs/vkd3d-utils/vkd3d_utils_private.h
+++ b/libs/vkd3d-utils/vkd3d_utils_private.h
@@ -24,6 +24,7 @@
 #define __VKD3D_UTILS_PRIVATE_H
 
 #include <pthread.h>
+#include <vkd3d.h>
 
 #define COBJMACROS
 #define NONAMELESSUNION