diff --git a/include/kernaux/console.h b/include/kernaux/console.h
index 9a27f94..f623da5 100644
--- a/include/kernaux/console.h
+++ b/include/kernaux/console.h
@@ -6,7 +6,8 @@ extern "C" {
 #endif
 
 void kernaux_console_print(const char *s);
-void kernaux_console_printf(const char *format, ...);
+void kernaux_console_printf(const char *format, ...)
+__attribute__((format(printf, 1, 2)));
 void kernaux_console_putc(char c);
 void kernaux_console_puts(const char *s);
 void kernaux_console_write(const char *data, unsigned int size);
diff --git a/src/multiboot2/print.c b/src/multiboot2/print.c
index 8c192e3..63f98c4 100644
--- a/src/multiboot2/print.c
+++ b/src/multiboot2/print.c
@@ -8,13 +8,13 @@ static const char *KernAux_Multiboot2_TagType_to_str(
 
 static void KernAux_Multiboot2_Tag_MemoryMap_print(
     const struct KernAux_Multiboot2_Tag_MemoryMap *tag,
-    void (*printf)(const char *format, ...)
+    void (*printf)(const char *format, ...) __attribute__((format(printf, 1, 2)))
 )
 __attribute__((nonnull));
 
 static void KernAux_Multiboot2_Tag_ELFSymbols_print(
     const struct KernAux_Multiboot2_Tag_ELFSymbols *tag,
-    void (*printf)(const char *format, ...)
+    void (*printf)(const char *format, ...) __attribute__((format(printf, 1, 2)))
 )
 __attribute__((nonnull));
 
@@ -73,7 +73,7 @@ const char *KernAux_Multiboot2_TagType_to_str(
 
 void KernAux_Multiboot2_print(
     const struct KernAux_Multiboot2 *const multiboot2,
-    void (*const printf)(const char *format, ...)
+    void (*const printf)(const char *format, ...) __attribute__((format(printf, 1, 2)))
 ) {
     printf("Multiboot 2 info\n");
     printf("  size: %u\n", multiboot2->total_size);
@@ -97,7 +97,7 @@ void KernAux_Multiboot2_print(
 
 void KernAux_Multiboot2_TagBase_print(
     const struct KernAux_Multiboot2_TagBase *const tag_base,
-    void (*const printf)(const char *format, ...)
+    void (*const printf)(const char *format, ...) __attribute__((format(printf, 1, 2)))
 ) {
     if (!KernAux_Multiboot2_TagBase_is_valid(tag_base)) {
         return;
@@ -283,7 +283,7 @@ void KernAux_Multiboot2_TagBase_print(
 
 void KernAux_Multiboot2_Tag_MemoryMap_print(
     const struct KernAux_Multiboot2_Tag_MemoryMap *const tag,
-    void (*printf)(const char *format, ...)
+    void (*printf)(const char *format, ...) __attribute__((format(printf, 1, 2)))
 ) {
     if (!KernAux_Multiboot2_Tag_MemoryMap_is_valid(tag)) {
         printf("  invalid!\n");
@@ -313,7 +313,7 @@ void KernAux_Multiboot2_Tag_MemoryMap_print(
 
 void KernAux_Multiboot2_Tag_ELFSymbols_print(
     const struct KernAux_Multiboot2_Tag_ELFSymbols *const tag,
-    void (*printf)(const char *format, ...)
+    void (*printf)(const char *format, ...) __attribute__((format(printf, 1, 2)))
 ) {
     if (!KernAux_Multiboot2_Tag_ELFSymbols_is_valid(tag)) {
         printf("  invalid!\n");