diff --git a/include/mgba/internal/arm/arm.h b/include/mgba/internal/arm/arm.h
index 298ee406d..29921d62b 100644
--- a/include/mgba/internal/arm/arm.h
+++ b/include/mgba/internal/arm/arm.h
@@ -261,10 +261,8 @@ void ARMHalt(struct ARMCore*);
 
 void ARMv4Run(struct ARMCore* cpu);
 void ARMv4RunLoop(struct ARMCore* cpu);
-int32_t ARMv4RunCycles(struct ARMCore* cpu, int32_t cycles);
 void ARMv5Run(struct ARMCore* cpu);
 void ARMv5RunLoop(struct ARMCore* cpu);
-int32_t ARMv5RunCycles(struct ARMCore* cpu, int32_t cycles);
 void ARMRunFake(struct ARMCore* cpu, uint32_t opcode);
 
 CXX_GUARD_END