diff --git a/include/ncpathmgr.h b/include/ncpathmgr.h
index d46e52d82a..c9b8d35fbf 100644
--- a/include/ncpathmgr.h
+++ b/include/ncpathmgr.h
@@ -94,7 +94,7 @@ NCPD_MINGW  | <mountpoint>/<path> | <drive>:<path>
 #define WINPATH 1
 #endif
 #endif
-#ifdef _WIN64
+#ifdef _WIN32
 #define STAT struct _stat64 *
 #else
 #define STAT struct _stat *
diff --git a/libnczarr/zmap_file.c b/libnczarr/zmap_file.c
index a867cc20c2..3ced98c55f 100644
--- a/libnczarr/zmap_file.c
+++ b/libnczarr/zmap_file.c
@@ -688,7 +688,7 @@ static int
 platformtestcontentbearing(const char* canonpath)
 {
     int ret = 0;
-    #ifdef _WIN64
+    #ifdef _WIN32
         struct _stat64 buf;
     #else
         struct stat buf;
@@ -1173,7 +1173,7 @@ static int
 verify(const char* path, int isdir)
 {
     int ret = 0;
-    #ifdef _WIN64
+    #ifdef _WIN32
         struct _stat64 buf;
     #else
         struct stat buf;
@@ -1193,7 +1193,7 @@ static int
 verifykey(const char* key, int isdir)
 {
     int ret = 0;
-    #ifdef _WIN64
+    #ifdef _WIN32
         struct _stat64 buf;
     #else
         struct stat buf;
diff --git a/libnczarr/zplugins.c b/libnczarr/zplugins.c
index aeb1ee3ebf..f639a686a4 100644
--- a/libnczarr/zplugins.c
+++ b/libnczarr/zplugins.c
@@ -221,7 +221,7 @@ NCZ_load_all_plugins(void)
     int ret = NC_NOERR;
     size_t i,j;
     struct NCglobalstate* gs = NC_getglobalstate();
-    #ifdef _WIN64
+    #ifdef _WIN32
         struct _stat64 buf;
     #else
         struct stat buf;