diff --git a/src/ldso/pe_get_framework_runtime_data.c b/src/ldso/pe_get_framework_runtime_data.c
index ba9d903..1fabf40 100644
--- a/src/ldso/pe_get_framework_runtime_data.c
+++ b/src/ldso/pe_get_framework_runtime_data.c
@@ -31,7 +31,7 @@ static int32_t pe_hex_utf16_to_uint32(
 		if (!((hex_key_utf16[i] >= 'a') && (hex_key_utf16[i] <= 'f')))
 			if (!((hex_key_utf16[i] >= 'A') && (hex_key_utf16[i] <= 'F')))
 				if (!((hex_key_utf16[i] >= '0') && (hex_key_utf16[i] <= '9')))
-					return OS_STATUS_ILLEGAL_CHARACTER;
+					return OS_STATUS_INVALID_PARAMETER;
 
 	/* intermediate step: little endian byte order */
 	uch[0] = (unsigned char)hex_key_utf16[6];