diff --git a/cursor/os-compatibility.c b/cursor/os-compatibility.c
index 9008755..6f5b39f 100644
--- a/cursor/os-compatibility.c
+++ b/cursor/os-compatibility.c
@@ -156,19 +156,24 @@
 	}
 
 #ifdef HAVE_POSIX_FALLOCATE
+	/* 
+	 * Filesystems that do support fallocate will return EOPNOTSUPP.
+	 * In this case we need to fall back to ftruncate
+	 */
 	ret = posix_fallocate(fd, 0, size);
-	if (ret != 0) {
+	if (ret == 0) {
+		return fd;
+	} else if (ret != EOPNOTSUPP) {
 		close(fd);
 		errno = ret;
 		return -1;
 	}
-#else
+#endif
 	ret = ftruncate(fd, size);
 	if (ret < 0) {
 		close(fd);
 		return -1;
 	}
-#endif
 
 	return fd;
 }