diff --git a/cpu/o3/fu_pool.cc b/cpu/o3/fu_pool.cc
index cb7a150618..fb2b5c00d3 100644
--- a/cpu/o3/fu_pool.cc
+++ b/cpu/o3/fu_pool.cc
@@ -189,7 +189,7 @@ FUPool::getUnit(OpClass capability)
 }
 
 void
-FUPool::freeUnit(int fu_idx)
+FUPool::freeUnitNextCycle(int fu_idx)
 {
     assert(unitBusy[fu_idx]);
     unitsToBeFreed.push_back(fu_idx);
diff --git a/cpu/o3/fu_pool.hh b/cpu/o3/fu_pool.hh
index 7df5ad5f32..da6fdc8021 100644
--- a/cpu/o3/fu_pool.hh
+++ b/cpu/o3/fu_pool.hh
@@ -134,7 +134,7 @@ class FUPool : public SimObject
     int getUnit(OpClass capability);
 
     /** Frees a FU at the end of this cycle. */
-    void freeUnit(int fu_idx);
+    void freeUnitNextCycle(int fu_idx);
 
     /** Frees all FUs on the list. */
     void processFreeUnits();