diff --git a/grub-core/efiemu/i386/loadcore64.c b/grub-core/efiemu/i386/loadcore64.c
index 18facf47f..7316efc39 100644
--- a/grub-core/efiemu/i386/loadcore64.c
+++ b/grub-core/efiemu/i386/loadcore64.c
@@ -122,7 +122,8 @@ grub_arch_efiemu_relocate_symbols64 (grub_efiemu_segment_t segs,
                     break;
 		  default:
 		    return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
-				       N_("relocation 0x%x is not implemented yet"),
+				       N_("relocation 0x%" PRIxGRUB_UINT64_T
+					  " is not implemented yet"),
 				       ELF_R_TYPE (rel->r_info));
 		  }
 	      }
diff --git a/grub-core/kern/arm64/dl.c b/grub-core/kern/arm64/dl.c
index fb0337319..401672374 100644
--- a/grub-core/kern/arm64/dl.c
+++ b/grub-core/kern/arm64/dl.c
@@ -184,7 +184,8 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
 
 	default:
 	  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
-			     N_("relocation 0x%x is not implemented yet"),
+			     N_("relocation 0x%" PRIxGRUB_UINT64_T
+				" is not implemented yet"),
 			     ELF_R_TYPE (rel->r_info));
 	}
     }
diff --git a/grub-core/kern/ia64/dl.c b/grub-core/kern/ia64/dl.c
index ebcf31629..b19706c50 100644
--- a/grub-core/kern/ia64/dl.c
+++ b/grub-core/kern/ia64/dl.c
@@ -137,7 +137,8 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
 	  break;
 	default:
 	  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
-			     N_("relocation 0x%x is not implemented yet"),
+			     N_("relocation 0x%" PRIxGRUB_UINT64_T
+				" is not implemented yet"),
 			     ELF_R_TYPE (rel->r_info));
 	}
     }
diff --git a/grub-core/kern/riscv/dl.c b/grub-core/kern/riscv/dl.c
index 6fb8385ef..d78297eee 100644
--- a/grub-core/kern/riscv/dl.c
+++ b/grub-core/kern/riscv/dl.c
@@ -331,8 +331,9 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
 	  break;
 	default:
 	  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
-			     N_("relocation 0x%x is not implemented yet"),
-			     ELF_R_TYPE (rel->r_info));
+			     N_("relocation 0x%" PRIxGRUB_UINT64_T
+				" is not implemented yet"),
+			     (grub_uint64_t) ELF_R_TYPE (rel->r_info));
 	}
     }
 
diff --git a/grub-core/kern/sparc64/dl.c b/grub-core/kern/sparc64/dl.c
index 739be4717..bbcce8ed5 100644
--- a/grub-core/kern/sparc64/dl.c
+++ b/grub-core/kern/sparc64/dl.c
@@ -177,7 +177,8 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
 	  break;
 	default:
 	  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
-			     N_("relocation 0x%x is not implemented yet"),
+			     N_("relocation 0x%" PRIxGRUB_UINT64_T
+				" is not implemented yet"),
 			     ELF_R_TYPE (rel->r_info));
 	}
     }
diff --git a/grub-core/kern/x86_64/dl.c b/grub-core/kern/x86_64/dl.c
index 3a73e6e6c..1af5a0eeb 100644
--- a/grub-core/kern/x86_64/dl.c
+++ b/grub-core/kern/x86_64/dl.c
@@ -107,7 +107,8 @@ grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr,
 
 	default:
 	  return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
-			     N_("relocation 0x%x is not implemented yet"),
+			     N_("relocation 0x%" PRIxGRUB_UINT64_T
+			        " is not implemented yet"),
 			     ELF_R_TYPE (rel->r_info));
 	}
     }