diff --git a/src/dex_instruction.h b/src/dex_instruction.h
index 204d6e6..3a0dfff 100644
--- a/src/dex_instruction.h
+++ b/src/dex_instruction.h
@@ -275,7 +275,7 @@ s4 dexInstr_getVRegH(u2 *);
 u2 dexInstr_getVRegH_45cc(u2 *);
 u2 dexInstr_getVRegH_4rcc(u2 *);
 bool dexInstr_hasVarArgs(u2 *);
-void dexInstr_getVarArgs(u2 *, u4[]);
+void dexInstr_getVarArgs(u2 *, u4[kMaxVarArgRegs]);
 
 // Set register functions
 void dexInstr_SetVRegA_10x(u2 *, u1);
@@ -302,3 +302,4 @@ extern const char *const kInstructionNames[];
 extern instrDesc_t const kInstructionDescriptors[];
 
 #endif
+