diff --git a/src/backend/jit/llvm/llvmjit.c b/src/backend/jit/llvm/llvmjit.c
index fc0ccea329c..caf261a559f 100644
--- a/src/backend/jit/llvm/llvmjit.c
+++ b/src/backend/jit/llvm/llvmjit.c
@@ -77,7 +77,7 @@ LLVMTypeRef StructAggStatePerTransData;
 
 LLVMValueRef AttributeTemplate;
 
-LLVMModuleRef llvm_types_module = NULL;
+static LLVMModuleRef llvm_types_module = NULL;
 
 static bool llvm_session_initialized = false;
 static size_t llvm_generation = 0;
diff --git a/src/include/jit/llvmjit.h b/src/include/jit/llvmjit.h
index 551b5854646..17b3b7593ff 100644
--- a/src/include/jit/llvmjit.h
+++ b/src/include/jit/llvmjit.h
@@ -55,9 +55,6 @@ typedef struct LLVMJitContext
 	List	   *handles;
 } LLVMJitContext;
 
-/* llvm module containing information about types */
-extern PGDLLIMPORT LLVMModuleRef llvm_types_module;
-
 /* type and struct definitions */
 extern PGDLLIMPORT LLVMTypeRef TypeParamBool;
 extern PGDLLIMPORT LLVMTypeRef TypePGFunction;