diff --git a/modules/core/include/opencv2/core/types_c.h b/modules/core/include/opencv2/core/types_c.h
index 9e9231db08..c21cd2c758 100644
--- a/modules/core/include/opencv2/core/types_c.h
+++ b/modules/core/include/opencv2/core/types_c.h
@@ -317,6 +317,7 @@ enum {
 #define ARM_ROUND(_value, _asm_string) \
     int res; \
     float temp; \
+    (void)temp; \
     asm(_asm_string : [res] "=r" (res), [temp] "=w" (temp) : [value] "w" (_value)); \
     return res;
 // 2. version for double