diff --git a/tests/A64/inst_gen.cpp b/tests/A64/inst_gen.cpp
index 977531f6..8b212173 100644
--- a/tests/A64/inst_gen.cpp
+++ b/tests/A64/inst_gen.cpp
@@ -36,5 +36,3 @@ u32 InstructionGenerator::Generate() const {
     } while (IsInvalidInstruction(inst));
     return inst;
 }
-
-std::vector<InstructionGenerator> InstructionGenerator::invalid_instructions;
diff --git a/tests/A64/inst_gen.h b/tests/A64/inst_gen.h
index cb29cebb..64316d84 100644
--- a/tests/A64/inst_gen.h
+++ b/tests/A64/inst_gen.h
@@ -30,7 +30,7 @@ public:
     }
 
 private:
-    static std::vector<InstructionGenerator> invalid_instructions;
+    static inline std::vector<InstructionGenerator> invalid_instructions;
 
     u32 bits = 0;
     u32 mask = 0;