1 files changed, 1 insertions, 0 deletions
diff --git a/e_os2.h b/e_os2.h
index 81be3025f6..80ec03ee8c 100644
--- a/e_os2.h
+++ b/e_os2.h
@@ -201,6 +201,7 @@ extern "C" {
 
 /* Specials for I/O an exit */
 #ifdef OPENSSL_SYS_MSDOS
+# define OPENSSL_NO_FP_API
 # define OPENSSL_UNISTD_IO <io.h>
 # define OPENSSL_DECLARE_EXIT extern void exit(int);
 #else