diff --git a/rdtk/librdtk/rdtk_font.c b/rdtk/librdtk/rdtk_font.c
index deb09deb3..27f32401d 100644
--- a/rdtk/librdtk/rdtk_font.c
+++ b/rdtk/librdtk/rdtk_font.c
@@ -240,7 +240,8 @@ static int rdtk_font_convert_descriptor_code_to_utf8(const char* str, uint8_t* u
 	return 1;
 }
 
-static int rdtk_font_parse_descriptor_buffer(rdtkFont* font, char* buffer, size_t size)
+static int rdtk_font_parse_descriptor_buffer(rdtkFont* font, char* buffer,
+                                             WINPR_ATTR_UNUSED size_t size)
 {
 	int rc = -1;
 
diff --git a/rdtk/librdtk/rdtk_label.c b/rdtk/librdtk/rdtk_label.c
index 298bf1711..f0220858b 100644
--- a/rdtk/librdtk/rdtk_label.c
+++ b/rdtk/librdtk/rdtk_label.c
@@ -25,8 +25,8 @@
 #include "rdtk_label.h"
 
 int rdtk_label_draw(rdtkSurface* surface, uint16_t nXDst, uint16_t nYDst, uint16_t nWidth,
-                    uint16_t nHeight, rdtkLabel* label, const char* text, uint16_t hAlign,
-                    uint16_t vAlign)
+                    uint16_t nHeight, WINPR_ATTR_UNUSED rdtkLabel* label, const char* text,
+                    WINPR_ATTR_UNUSED uint16_t hAlign, WINPR_ATTR_UNUSED uint16_t vAlign)
 {
 	uint16_t offsetX = 0;
 	uint16_t offsetY = 0;