diff --git a/components/wpa_supplicant/port/include/os.h b/components/wpa_supplicant/port/include/os.h
index 8f105080..a7c8eadc 100644
--- a/components/wpa_supplicant/port/include/os.h
+++ b/components/wpa_supplicant/port/include/os.h
@@ -22,6 +22,10 @@
 // #include "esp32/rom/ets_sys.h"
 #include "esp_libc.h"
 
+#if CONFIG_LTM_FAST
+#define LTM_FAST
+#endif
+
 typedef time_t os_time_t;
 
 /**
diff --git a/components/wpa_supplicant/src/crypto/libtommath.h b/components/wpa_supplicant/src/crypto/libtommath.h
index 487be1ec..1010f9f6 100644
--- a/components/wpa_supplicant/src/crypto/libtommath.h
+++ b/components/wpa_supplicant/src/crypto/libtommath.h
@@ -17,9 +17,6 @@
 #include "os.h"
 #include "stdarg.h"
 
-#if CONFIG_LTM_FAST
-#define LTM_FAST
-#endif
 
 #ifndef CHAR_BIT
 #define CHAR_BIT 8
diff --git a/components/wpa_supplicant/src/tls/libtommath.h b/components/wpa_supplicant/src/tls/libtommath.h
index 20141d0c..07574de7 100644
--- a/components/wpa_supplicant/src/tls/libtommath.h
+++ b/components/wpa_supplicant/src/tls/libtommath.h
@@ -16,10 +16,6 @@
 #include "os.h"
 #include "stdarg.h"
 
-#if CONFIG_LTM_FAST
-#define LTM_FAST
-#endif
-
 #ifndef CHAR_BIT
 #define CHAR_BIT 8
 #endif