diff --git a/cli_common.c b/cli_common.c
index 71cc2dd..256f1fa 100644
--- a/cli_common.c
+++ b/cli_common.c
@@ -24,40 +24,6 @@
 #include <string.h>
 #include "flash.h"
 
-/*
- * Return a string corresponding to the bustype parameter.
- * Memory is obtained with malloc() and must be freed with free() by the caller.
- */
-char *flashbuses_to_text(enum chipbustype bustype)
-{
-	char *ret = calloc(1, 1);
-	/*
-	 * FIXME: Once all chipsets and flash chips have been updated, NONSPI
-	 * will cease to exist and should be eliminated here as well.
-	 */
-	if (bustype == BUS_NONSPI) {
-		ret = strcat_realloc(ret, "Non-SPI, ");
-	} else {
-		if (bustype & BUS_PARALLEL)
-			ret = strcat_realloc(ret, "Parallel, ");
-		if (bustype & BUS_LPC)
-			ret = strcat_realloc(ret, "LPC, ");
-		if (bustype & BUS_FWH)
-			ret = strcat_realloc(ret, "FWH, ");
-		if (bustype & BUS_SPI)
-			ret = strcat_realloc(ret, "SPI, ");
-		if (bustype & BUS_PROG)
-			ret = strcat_realloc(ret, "Programmer-specific, ");
-		if (bustype == BUS_NONE)
-			ret = strcat_realloc(ret, "None, ");
-	}
-	/* Kill last comma. */
-	ret[strlen(ret) - 2] = '\0';
-	ret = realloc(ret, strlen(ret) + 1);
-	return ret;
-}
-
-
 void print_chip_support_status(const struct flashchip *chip)
 {
 	if (chip->feature_bits & FEATURE_OTP) {
diff --git a/flash.h b/flash.h
index 47c32f4..b5eb99b 100644
--- a/flash.h
+++ b/flash.h
@@ -264,13 +264,14 @@
 #ifdef __MINGW32__
 char* strtok_r(char *str, const char *delim, char **nextp);
 #endif
-#if defined(__DJGPP__) || !defined(HAVE_STRNLEN)
+#if defined(__DJGPP__) || (!defined(__LIBPAYLOAD__) && !defined(HAVE_STRNLEN))
 size_t strnlen(const char *str, size_t n);
 #endif
 
 /* flashrom.c */
 extern const char flashrom_version[];
 extern const char *chip_to_probe;
+char *flashbuses_to_text(enum chipbustype bustype);
 int map_flash(struct flashctx *flash);
 void unmap_flash(struct flashctx *flash);
 int read_memmapped(struct flashctx *flash, uint8_t *buf, unsigned int start, unsigned int len);
@@ -308,7 +309,6 @@
 #define ERROR_FLASHROM_LIMIT -201
 
 /* cli_common.c */
-char *flashbuses_to_text(enum chipbustype bustype);
 void print_chip_support_status(const struct flashchip *chip);
 
 /* cli_output.c */
diff --git a/flashrom.c b/flashrom.c
index 838dfd0..379f75e 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -1163,6 +1163,39 @@
 	return 0;
 }
 
+/*
+ * Return a string corresponding to the bustype parameter.
+ * Memory is obtained with malloc() and must be freed with free() by the caller.
+ */
+char *flashbuses_to_text(enum chipbustype bustype)
+{
+	char *ret = calloc(1, 1);
+	/*
+	 * FIXME: Once all chipsets and flash chips have been updated, NONSPI
+	 * will cease to exist and should be eliminated here as well.
+	 */
+	if (bustype == BUS_NONSPI) {
+		ret = strcat_realloc(ret, "Non-SPI, ");
+	} else {
+		if (bustype & BUS_PARALLEL)
+			ret = strcat_realloc(ret, "Parallel, ");
+		if (bustype & BUS_LPC)
+			ret = strcat_realloc(ret, "LPC, ");
+		if (bustype & BUS_FWH)
+			ret = strcat_realloc(ret, "FWH, ");
+		if (bustype & BUS_SPI)
+			ret = strcat_realloc(ret, "SPI, ");
+		if (bustype & BUS_PROG)
+			ret = strcat_realloc(ret, "Programmer-specific, ");
+		if (bustype == BUS_NONE)
+			ret = strcat_realloc(ret, "None, ");
+	}
+	/* Kill last comma. */
+	ret[strlen(ret) - 2] = '\0';
+	ret = realloc(ret, strlen(ret) + 1);
+	return ret;
+}
+
 int probe_flash(struct registered_master *mst, int startchip, struct flashctx *flash, int force)
 {
 	const struct flashchip *chip;
diff --git a/helpers.c b/helpers.c
index f6eae46..8bc808a 100644
--- a/helpers.c
+++ b/helpers.c
@@ -92,7 +92,7 @@
 #endif
 
 /* There is no strnlen in DJGPP */
-#if defined(__DJGPP__) || !defined(HAVE_STRNLEN)
+#if defined(__DJGPP__) || (!defined(__LIBPAYLOAD__) && !defined(HAVE_STRNLEN))
 size_t strnlen(const char *str, size_t n)
 {
 	size_t i;