diff --git a/project/common.mk b/project/common.mk
index 453b6bf..ef5b62f 100644
--- a/project/common.mk
+++ b/project/common.mk
@@ -2,6 +2,7 @@ API_SRCS = \
 
 INTERNAL_SRCS = \
 	src/internal/nolibc/toksvc_compiler.c \
+	src/internal/toksvc_dprintf_impl.c \
 	src/internal/toksvc_nolibc_impl.c \
 	src/internal/toksvc_ntaio_impl.c \
 
diff --git a/project/headers.mk b/project/headers.mk
index 19d613e..80fde47 100644
--- a/project/headers.mk
+++ b/project/headers.mk
@@ -11,6 +11,7 @@ INTERNAL_HEADERS = \
 	$(SOURCE_DIR)/src/internal/nolibc/stdlib.h \
 	$(SOURCE_DIR)/src/internal/nolibc/string.h \
 	$(SOURCE_DIR)/src/internal/nolibc/unistd.h \
+	$(SOURCE_DIR)/src/internal/toksvc_dprintf_impl.h \
 	$(SOURCE_DIR)/src/internal/toksvc_nolibc_impl.h \
 
 ALL_HEADERS = $(API_HEADERS) $(INTERNAL_HEADERS)
diff --git a/src/internal/toksvc_dprintf_impl.c b/src/internal/toksvc_dprintf_impl.c
new file mode 100644
index 0000000..f74ef35
--- /dev/null
+++ b/src/internal/toksvc_dprintf_impl.c
@@ -0,0 +1,67 @@
+/*********************************************************/
+/*  toksvc: a framework-native token broker service      */
+/*  Copyright (C) 2020  Z. Gilboa                        */
+/*  Released under GPLv2 and GPLv3; see COPYING.TOKSVC.  */
+/*********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/ntapi.h>
+
+#include <toksvc/toksvc.h>
+#include "toksvc_driver_impl.h"
+#include "toksvc_nolibc_impl.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int toks_dprintf(int fd, const char * fmt, ...)
+{
+	int	ret;
+	int	cnt;
+	int	size;
+	va_list	ap;
+	char *	ch;
+	char *	buf;
+	char	chbuf[2048];
+
+	va_start(ap,fmt);
+
+	size = sizeof(chbuf);
+	buf  = ((cnt = ntapi->vsnprintf(chbuf,size,fmt,ap)) < size)
+		? chbuf : calloc(1, cnt + 1);
+
+	va_end(ap);
+
+	if (buf == chbuf) {
+		(void)0;
+
+	} else if (buf) {
+		va_start(ap,fmt);
+		ntapi->vsprintf(buf,fmt,ap);
+		va_end(ap);
+
+	} else {
+		return -1;
+	}
+
+	ret = 0;
+	ch  = buf;
+
+	for (; cnt && ret>=0; ) {
+		ret = toks_write(fd,ch,cnt);
+
+		while ((ret == NT_STATUS_ALERTED) || (ret == NT_STATUS_USER_APC))
+			ret = toks_write(fd,ch,cnt);
+
+		ch  += ret;
+		cnt -= ret;
+	}
+
+	ret = (ret < 0) ? -1 : ch - buf;
+
+	if (buf != chbuf)
+		free(buf);
+
+	return ret;
+}
diff --git a/src/internal/toksvc_dprintf_impl.h b/src/internal/toksvc_dprintf_impl.h
new file mode 100644
index 0000000..7a2ce06
--- /dev/null
+++ b/src/internal/toksvc_dprintf_impl.h
@@ -0,0 +1,10 @@
+#ifndef TOKSVC_DPRINTF_IMPL_H
+#define TOKSVC_DPRINTF_IMPL_H
+
+#ifdef  ARGV_DRIVER
+#define argv_dprintf toks_dprintf
+#endif
+
+int toks_dprintf(int fd, const char * fmt, ...);
+
+#endif