diff --git a/include/JSystem/JParticle/JPAResource.h b/include/JSystem/JParticle/JPAResource.h
index f207f15d883..5b3e891bc32 100644
--- a/include/JSystem/JParticle/JPAResource.h
+++ b/include/JSystem/JParticle/JPAResource.h
@@ -20,7 +20,7 @@ class JPAResource {
 public:
     /* 80274010 */ JPAResource();
     /* 80274080 */ void init(JKRHeap*);
-    /* 802755E8 */ void calc(JPAEmitterWorkData*, JPABaseEmitter*);
+    /* 802755E8 */ bool calc(JPAEmitterWorkData*, JPABaseEmitter*);
     /* 80275A94 */ void draw(JPAEmitterWorkData*, JPABaseEmitter*);
     /* 80275B74 */ void drawP(JPAEmitterWorkData*);
     /* 80275EB0 */ void drawC(JPAEmitterWorkData*);
diff --git a/libs/JSystem/JParticle/JPAEmitterManager.cpp b/libs/JSystem/JParticle/JPAEmitterManager.cpp
index 079cd5ca11b..bf11dba204e 100644
--- a/libs/JSystem/JParticle/JPAEmitterManager.cpp
+++ b/libs/JSystem/JParticle/JPAEmitterManager.cpp
@@ -14,12 +14,6 @@
 // Types:
 //
 
-struct JPAResource;
-struct JPAResource {
-    /* 802755E8 */ bool calc(JPAEmitterWorkData*, JPABaseEmitter*);
-    /* 80275A94 */ void draw(JPAEmitterWorkData*, JPABaseEmitter*);
-};
-
 //
 // Forward References:
 //
diff --git a/libs/JSystem/JParticle/JPAResource.cpp b/libs/JSystem/JParticle/JPAResource.cpp
index ecab76d0213..64df9b337e1 100644
--- a/libs/JSystem/JParticle/JPAResource.cpp
+++ b/libs/JSystem/JParticle/JPAResource.cpp
@@ -587,7 +587,7 @@ asm void JPAResource::init(JKRHeap* param_0) {
 #pragma push
 #pragma optimization_level 0
 #pragma optimizewithasm off
-asm void JPAResource::calc(JPAEmitterWorkData* param_0, JPABaseEmitter* param_1) {
+asm bool JPAResource::calc(JPAEmitterWorkData* param_0, JPABaseEmitter* param_1) {
     nofralloc
 #include "asm/JSystem/JParticle/JPAResource/calc__11JPAResourceFP18JPAEmitterWorkDataP14JPABaseEmitter.s"
 }