diff --git a/cpukit/score/cpu/or1k/cpu.c b/cpukit/score/cpu/or1k/cpu.c
index e9b77b2f7f..7223094e51 100644
--- a/cpukit/score/cpu/or1k/cpu.c
+++ b/cpukit/score/cpu/or1k/cpu.c
@@ -131,6 +131,8 @@ void _CPU_ISR_install_vector(
 
 void *_CPU_Thread_Idle_body( uintptr_t ignored )
 {
+  (void) ignored;
+
   do {
      _OR1K_CPU_Sleep();
   } while (1);
diff --git a/cpukit/score/cpu/or1k/or1k-context-initialize.c b/cpukit/score/cpu/or1k/or1k-context-initialize.c
index 49a5ff1079..7f57a7a22d 100644
--- a/cpukit/score/cpu/or1k/or1k-context-initialize.c
+++ b/cpukit/score/cpu/or1k/or1k-context-initialize.c
@@ -48,6 +48,10 @@ void _CPU_Context_Initialize(
   void *tls_area
 )
 {
+  (void) new_level;
+  (void) is_fp;
+  (void) tls_area;
+
   /* Decrement 200 byte to account for red-zone */
   uint32_t stack = ((uint32_t) stack_area_begin) - 200;
   uint32_t sr;
diff --git a/cpukit/score/cpu/or1k/or1k-exception-default.c b/cpukit/score/cpu/or1k/or1k-exception-default.c
index c7e5cb5b82..fe6d5f275e 100644
--- a/cpukit/score/cpu/or1k/or1k-exception-default.c
+++ b/cpukit/score/cpu/or1k/or1k-exception-default.c
@@ -37,5 +37,7 @@ void _OR1K_Exception_default(uint32_t vector, CPU_Exception_frame *frame);
 
 void _OR1K_Exception_default(uint32_t vector, CPU_Exception_frame *frame)
 {
+  (void) vector;
+
   rtems_fatal( RTEMS_FATAL_SOURCE_EXCEPTION, (rtems_fatal_code) frame );
 }