diff --git a/cyassl/ctaocrypt/settings.h b/cyassl/ctaocrypt/settings.h
index d38956be9..ccdcd8eb7 100644
--- a/cyassl/ctaocrypt/settings.h
+++ b/cyassl/ctaocrypt/settings.h
@@ -99,6 +99,15 @@
     #define USE_WINDOWS_API
 #endif
 
+
+#ifdef CYASSL_LEANPSK
+    #include <stdlib.h>
+    #define XMALLOC(s, h, type)  malloc((s))
+    #define XFREE(p, h, type)    free((p)) 
+    #define XREALLOC(p, n, h, t) realloc((p), (n))
+#endif
+
+
 #ifdef FREERTOS
     #define NO_WRITEV
     #define NO_SHA512
@@ -413,7 +422,8 @@
 #endif /* MICRIUM */
 
 
-#if !defined(XMALLOC_USER) && !defined(MICRIUM_MALLOC)
+#if !defined(XMALLOC_USER) && !defined(MICRIUM_MALLOC) && \
+                              !defined(CYASSL_LEANPSK)
     #define USE_CYASSL_MEMORY
 #endif
 
diff --git a/cyassl/ctaocrypt/types.h b/cyassl/ctaocrypt/types.h
index 72f633da4..286280abb 100644
--- a/cyassl/ctaocrypt/types.h
+++ b/cyassl/ctaocrypt/types.h
@@ -151,7 +151,8 @@ enum {
     extern void *XREALLOC(void *p, size_t n, void* heap, int type);
     extern void XFREE(void *p, void* heap, int type);
 #elif !defined(MICRIUM_MALLOC) && !defined(EBSNET) \
-        && !defined(CYASSL_SAFERTOS) && !defined(FREESCALE_MQX)
+        && !defined(CYASSL_SAFERTOS) && !defined(FREESCALE_MQX) \
+        && !defined(CYASSL_LEANPSK)
     /* default C runtime, can install different routines at runtime */
     #include <cyassl/ctaocrypt/memory.h>
     #define XMALLOC(s, h, t)     ((void)h, (void)t, CyaSSL_Malloc((s)))