diff --git a/Makefile b/Makefile
index 8750af08..7dcf5eb7 100644
--- a/Makefile
+++ b/Makefile
@@ -18,7 +18,7 @@ else
 	LDLIBS_CURSES ?= -lncurses
 endif
 
-CFLAGS += -Wall -Wextra -Wno-unused-parameter -Wno-format-truncation
+CFLAGS += -Wall -Wextra -Wno-unused-parameter
 CFLAGS += $(CFLAGS_OPTIMIZATION)
 CFLAGS += $(CFLAGS_CURSES)
 
diff --git a/src/nnn.c b/src/nnn.c
index 3d66b1dd..50acd352 100644
--- a/src/nnn.c
+++ b/src/nnn.c
@@ -2019,7 +2019,7 @@ static char *coolsize(off_t size)
 {
 	static const char * const U = "BKMGTPEZY";
 	static char size_buf[12]; /* Buffer to hold human readable size */
-	off_t rem;
+	static off_t rem;
 	int i;
 
 	rem = i = 0;
@@ -2067,9 +2067,9 @@ static char *coolsize(off_t size)
 	}
 
 	if (i > 0 && i < 6)
-		snprintf(size_buf, 12, "%lu.%0*lu%c", size, i, rem, U[i]);
+		snprintf(size_buf, 12, "%lu.%0*lu%c", (ulong)size, i, (ulong)rem, U[i]);
 	else
-		snprintf(size_buf, 12, "%lu%c", size, U[i]);
+		snprintf(size_buf, 12, "%lu%c", (ulong)size, U[i]);
 
 	return size_buf;
 }