diff --git a/criu/arch/aarch64/include/asm/types.h b/criu/arch/aarch64/include/asm/types.h
index 6dc534ffa..a3cb75841 100644
--- a/criu/arch/aarch64/include/asm/types.h
+++ b/criu/arch/aarch64/include/asm/types.h
@@ -64,7 +64,7 @@ typedef struct user_fpsimd_state user_fpregs_struct_t;
 
 int munmap(void *addr, size_t length);
 
-static inline unsigned long task_size() {
+static inline unsigned long task_size(void) {
 	unsigned long task_size;
 
 	for (task_size = TASK_SIZE_MIN; task_size < TASK_SIZE_MAX; task_size <<= 1)
diff --git a/criu/arch/ppc64/include/asm/types.h b/criu/arch/ppc64/include/asm/types.h
index 464dc818c..3f62dc64c 100644
--- a/criu/arch/ppc64/include/asm/types.h
+++ b/criu/arch/ppc64/include/asm/types.h
@@ -121,7 +121,7 @@ typedef uint64_t tls_t;
 #define TASK_SIZE_USER64 (0x0000400000000000UL)
 #define TASK_SIZE TASK_SIZE_USER64
 
-static inline unsigned long task_size() { return TASK_SIZE; }
+static inline unsigned long task_size(void) { return TASK_SIZE; }
 
 static inline void *decode_pointer(uint64_t v) { return (void*)v; }
 static inline uint64_t encode_pointer(void *p) { return (uint64_t)p; }