diff --git a/desmume/src/gtk/tools/ioregsView.cpp b/desmume/src/gtk/tools/ioregsView.cpp
index b71b4057c..c6b424e07 100644
--- a/desmume/src/gtk/tools/ioregsView.cpp
+++ b/desmume/src/gtk/tools/ioregsView.cpp
@@ -197,7 +197,7 @@ static const char *powercr7_strings[] =
 	"Sound speakers",
 	"Wifi system"
 };
-#define POWER_CR_SKIP(c) if(i==4||i==5||i==6||i==7||i==8||i==10||i==11|i==12|i==13||i==14)continue;
+#define POWER_CR_SKIP(c) if(i==4||i==5||i==6||i==7||i==8||i==10||i==11||i==12||i==13||i==14)continue;
 #define POWER_CR_SIZE(c) ((c==0)?16:2)
 
 static GtkWidget *Widgets_POWER_CR[2][16];
@@ -357,15 +357,15 @@ static void selected_reg(GtkWidget* widget, gpointer data)
 	
 	if(current_reg[c]->size == BITS_8)
 	{
-		sprintf(regInfosBuffer, "0x%02X", current_reg[c]->value(c));
+		sprintf(regInfosBuffer, "0x%02lX", current_reg[c]->value(c));
 	}
 	else if(current_reg[c]->size == BITS_16)
 	{
-		sprintf(regInfosBuffer, "0x%04X", current_reg[c]->value(c));
+		sprintf(regInfosBuffer, "0x%04lX", current_reg[c]->value(c));
 	}
 	else
 	{
-		sprintf(regInfosBuffer, "0x%08X", current_reg[c]->value(c));
+		sprintf(regInfosBuffer, "0x%08lX", current_reg[c]->value(c));
 	}
 // 	gtk_box_pack_start(GTK_BOX(mVbox0[c]), mRegInfos[c], FALSE, FALSE, 0);
 	gtk_label_set_label(GTK_LABEL(mRegInfos[c]), regInfosBuffer);
@@ -434,7 +434,7 @@ static void open(int ID)
 		for(i = 0; i < GET_REG_LIST_SIZE(c); i++)
 		{
 			char reg_name_buffer[64];
-			sprintf(reg_name_buffer, "0x%08X : %s (%s)", GET_REG_LIST(c)[i].adress, GET_REG_LIST(c)[i].name, bits_strings[GET_REG_LIST(c)[i].size]);
+			sprintf(reg_name_buffer, "0x%08lX : %s (%s)", GET_REG_LIST(c)[i].adress, GET_REG_LIST(c)[i].name, bits_strings[GET_REG_LIST(c)[i].size]);
 			gtk_combo_box_append_text(GTK_COMBO_BOX(mIoRegCombo[c]), reg_name_buffer);
 		}