diff --git a/console/rgl/ps3/rgl.h b/console/rgl/ps3/rgl.h
index de9ee1b414..5016752d1a 100644
--- a/console/rgl/ps3/rgl.h
+++ b/console/rgl/ps3/rgl.h
@@ -774,7 +774,7 @@ struct RGLResource
    RGLSemaphoreMemory *semaphores;
 };
 
-typedef volatile struct
+typedef struct
 {
    GLuint Ignored00[0x010];
    GLuint Put;
diff --git a/ps3/sdk_defines.h b/ps3/sdk_defines.h
index 0b6d455519..398b6050e0 100644
--- a/ps3/sdk_defines.h
+++ b/ps3/sdk_defines.h
@@ -310,6 +310,20 @@
 #define SYS_PPU_THREAD_CREATE_JOINABLE 0 /* FIXME - not sure if this is correct */
 #endif
 
+/*============================================================
+	SEMAPHORE PROTOTYPES
+============================================================ */
+
+#ifdef __PSL1GHT__
+#include <sys/sem.h>
+#define sys_semaphore_attribute_t sys_sem_attr_t
+#define sys_semaphore_value_t s32
+
+#define sys_semaphore_create sysSemCreate
+#define sys_semaphore_destroy sysSemDestroy
+#define sys_semaphore_post sysSemPost
+#endif
+
 /*============================================================
 	MEMORY PROTOTYPES
 ============================================================ */