diff --git a/kotstd/include/Assert.kt b/kotstd/include/Assert.kt
new file mode 100644
index 00000000000..6f377396697
--- /dev/null
+++ b/kotstd/include/Assert.kt
@@ -0,0 +1,6 @@
+external fun assert_c(value: Boolean)
+
+fun assert(value: Boolean) {
+    println(value)
+    assert_c(value)
+}
\ No newline at end of file
diff --git a/kotstd/lib/arm/assert_c.ll b/kotstd/lib/arm/assert_c.ll
new file mode 100644
index 00000000000..ac836c118dc
--- /dev/null
+++ b/kotstd/lib/arm/assert_c.ll
@@ -0,0 +1,12 @@
+; ModuleID = 'assert_arm.c'
+target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+target triple = "thumbv7m-none--eabi"
+
+; Function Attrs: nounwind
+define weak void @assert_c(i32 %value) #0 {
+  %1 = alloca i32, align 4
+  store i32 %value, i32* %1, align 4
+  ret void
+}
+
+attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
diff --git a/kotstd/lib/x86/assert_c.ll b/kotstd/lib/x86/assert_c.ll
new file mode 100644
index 00000000000..9f32a71fab7
--- /dev/null
+++ b/kotstd/lib/x86/assert_c.ll
@@ -0,0 +1,36 @@
+; ModuleID = 'assert_x86.c'
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-linux-gnu"
+
+@.str = private unnamed_addr constant [71 x i8] c"Exception in thread \22main\22 java.lang.AssertionError: Assertion failed\0A\00", align 1
+
+; Function Attrs: nounwind uwtable
+define void @assert_c(i32 %value) #0 {
+  %1 = alloca i32, align 4
+  store i32 %value, i32* %1, align 4
+  %2 = load i32* %1, align 4
+  %3 = icmp ne i32 %2, 0
+  br i1 %3, label %6, label %4
+
+; <label>:4                                       ; preds = %0
+  %5 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([71 x i8]* @.str, i32 0, i32 0))
+  call void @abort() #3
+  unreachable
+
+; <label>:6                                       ; preds = %0
+  ret void
+}
+
+declare i32 @printf(i8*, ...) #1
+
+; Function Attrs: noreturn nounwind
+declare void @abort() #2
+
+attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { noreturn nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #3 = { noreturn nounwind }
+
+!llvm.ident = !{!0}
+
+!0 = !{!"Ubuntu clang version 3.6.2-3ubuntu2 (tags/RELEASE_362/final) (based on LLVM 3.6.2)"}
diff --git a/kotstd/libc/assert_c.c b/kotstd/libc/assert_c.c
new file mode 100644
index 00000000000..e526eaaca41
--- /dev/null
+++ b/kotstd/libc/assert_c.c
@@ -0,0 +1,9 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+void assert_c(int value) {
+    if (!value) {
+        printf("Exception in thread \"main\" java.lang.AssertionError: Assertion failed\n");
+        abort();
+    }
+}
\ No newline at end of file