diff --git a/Makefile b/Makefile
index 2a8540a..56bf2e8 100644
--- a/Makefile
+++ b/Makefile
@@ -15,11 +15,6 @@ VERSION ?= $(shell git describe --tags HEAD 2>/dev/null || echo "unknown\ versio
 # the IPv6 socket API? (Linux does)
 DUAL_STACK_SOCKETS := 1
 
-RLIMIT_STACK_VAL := $(shell /bin/sh -c 'ulimit -s')
-ifeq ($(RLIMIT_STACK_VAL),unlimited)
-RLIMIT_STACK_VAL := 1024
-endif
-
 TARGET ?= $(shell $(CC) -dumpmachine)
 # Get 'uname -m'-like architecture description for target
 TARGET_ARCH := $(shell echo $(TARGET) | cut -f1 -d- | tr [A-Z] [a-z])
@@ -36,7 +31,6 @@ FLAGS := -Wall -Wextra -Wno-format-zero-length
 FLAGS += -pedantic -std=c11 -D_XOPEN_SOURCE=700 -D_GNU_SOURCE
 FLAGS +=  $(FORTIFY_FLAG) -O2 -pie -fPIE
 FLAGS += -DPAGE_SIZE=$(shell getconf PAGE_SIZE)
-FLAGS += -DRLIMIT_STACK_VAL=$(RLIMIT_STACK_VAL)
 FLAGS += -DVERSION=\"$(VERSION)\"
 FLAGS += -DDUAL_STACK_SOCKETS=$(DUAL_STACK_SOCKETS)
 
diff --git a/util.h b/util.h
index 3fc64cf..c341236 100644
--- a/util.h
+++ b/util.h
@@ -132,7 +132,7 @@ static inline uint32_t ntohl_unaligned(const void *p)
 	return ntohl(val);
 }
 
-#define NS_FN_STACK_SIZE	(RLIMIT_STACK_VAL * 1024 / 8)
+#define NS_FN_STACK_SIZE	(1024 * 1024) /* 1MiB */
 int do_clone(int (*fn)(void *), char *stack_area, size_t stack_size, int flags,
 	     void *arg);
 #define NS_CALL(fn, arg)						\