diff --git a/procinterrupts.c b/procinterrupts.c
index e372671..9015177 100644
--- a/procinterrupts.c
+++ b/procinterrupts.c
@@ -178,10 +178,12 @@ void init_irq_class_and_type(char *savedline, struct irq_info *info, int irq)
 	}
 
 #ifdef AARCH64
-	snprintf(irq_fullname, PATH_MAX, "%s %s", last_token, savedptr);
-	tmp = strchr(irq_fullname, '\n');
-	if (tmp)
-		*tmp = 0;
+	if (strlen(savedptr) > 0) {
+		snprintf(irq_fullname, PATH_MAX, "%s %s", last_token, savedptr);
+		tmp = strchr(irq_fullname, '\n');
+		if (tmp)
+			*tmp = 0;
+	}
 #else
 	snprintf(irq_fullname, PATH_MAX, "%s", last_token);
 #endif