diff --git a/src/audio/synthesis.c b/src/audio/synthesis.c
index 973c65a72..18a5182bb 100644
--- a/src/audio/synthesis.c
+++ b/src/audio/synthesis.c
@@ -343,7 +343,7 @@ Acmd* synthesis_process_note(s32 noteIndex, struct NoteSubEu* noteSubEu, struct
     u16 resamplingRateFixedPoint;
     s32 nSamplesToLoad;
 
-    s32 spFC;
+    s32 spFC = 0;
     UNUSED s32 pad2[2];
 
     s32 loopInfo_2;