diff --git a/Makefile b/Makefile
index 0b86c40..8c2fdec 100644
--- a/Makefile
+++ b/Makefile
@@ -74,10 +74,18 @@ SHE256_OBJ=$(OBJ_DIR)/she_c256.o
 SHE384_OBJ=$(OBJ_DIR)/she_c384.o
 ECDSA_OBJ=$(OBJ_DIR)/ecdsa_c.o
 FUNC_LIST=src/func.list
-MCL_USE_LLVM?=1
+ifeq ($(findstring $(OS),mingw64/cygwin),)
+  MCL_USE_LLVM?=1
+else
+  MCL_USE_LLVM=0
+endif
 ifeq ($(MCL_USE_LLVM),1)
   CFLAGS+=-DMCL_USE_LLVM=1
   LIB_OBJ+=$(ASM_OBJ)
+  # special case for intel with bmi2
+  ifeq ($(INTEL),1)
+    LIB_OBJ+=$(OBJ_DIR)/$(CPU).bmi2.o
+  endif
 endif
 LLVM_SRC=src/base$(BIT).ll
 
@@ -95,10 +103,6 @@ ifeq ($(USE_LOW_ASM),1)
   LOW_ASM_OBJ=$(LOW_ASM_SRC:.asm=.o)
   LIB_OBJ+=$(LOW_ASM_OBJ)
 endif
-# special case for intel with bmi2
-ifeq ($(INTEL),1)
-  LIB_OBJ+=$(OBJ_DIR)/$(CPU).bmi2.o
-endif
 
 ifeq ($(UPDATE_ASM),1)
   ASM_SRC_DEP=$(LLVM_SRC)
diff --git a/common.mk b/common.mk
index 3cf8638..aefa516 100644
--- a/common.mk
+++ b/common.mk
@@ -3,6 +3,13 @@ UNAME_S=$(shell uname -s)
 ifeq ($(UNAME_S),Linux)
   OS=Linux
 endif
+ifeq ($(findstring MINGW64,$(UNAME_S)),MINGW64)
+  OS=mingw64
+  CFLAGS+=-D__USE_MINGW_ANSI_STDIO=1
+endif
+ifeq ($(findstring CYGWIN,$(UNAME_S)),CYGWIN)
+  OS=cygwin
+endif
 ifeq ($(UNAME_S),Darwin)
   OS=mac
   ARCH=x86_64
@@ -44,7 +51,7 @@ ifeq ($(ARCH),aarch64)
   CPU=aarch64
   BIT=64
 endif
-ifneq ($(UNAME_S),Darwin)
+ifeq ($(findstring $(OS),Darwin/mingw64),)
   LDFLAGS+=-lrt
 endif
 
diff --git a/include/mcl/fp.hpp b/include/mcl/fp.hpp
index 0faa181..c2b0cc8 100644
--- a/include/mcl/fp.hpp
+++ b/include/mcl/fp.hpp
@@ -590,6 +590,6 @@ struct hash<mcl::FpT<tag, maxBitSize> > {
 CYBOZU_NAMESPACE_TR1_END } // std::tr1
 #endif
 
-#ifdef _WIN32
+#ifdef _MSC_VER
 	#pragma warning(pop)
 #endif
diff --git a/src/fp.cpp b/src/fp.cpp
index aa8924c..dfa6e11 100644
--- a/src/fp.cpp
+++ b/src/fp.cpp
@@ -648,7 +648,7 @@ int64_t getInt64(bool *pb, fp::Block& b, const fp::Op& op)
 	return 0;
 }
 
-#ifdef _WIN32
+#ifdef _MSC_VER
 	#pragma warning(pop)
 #endif
 
diff --git a/src/fp_generator.hpp b/src/fp_generator.hpp
index ab829c8..1f6af7c 100644
--- a/src/fp_generator.hpp
+++ b/src/fp_generator.hpp
@@ -2894,7 +2894,7 @@ private:
 
 } } // mcl::fp
 
-#ifdef _WIN32
+#ifdef _MSC_VER
 	#pragma warning(pop)
 #endif
 
diff --git a/src/low_func.hpp b/src/low_func.hpp
index 232f9eb..57c63cf 100644
--- a/src/low_func.hpp
+++ b/src/low_func.hpp
@@ -701,6 +701,6 @@ const void4u Fp2MulNF<N, Tag>::f = Fp2MulNF<N, Tag>::func;
 
 } } // mcl::fp
 
-#ifdef _WIN32
+#ifdef _MSC_VER
 	#pragma warning(pop)
 #endif