diff --git a/rtcore.h b/rtcore.h
index 6abd92c..0d280f0 100644
--- a/rtcore.h
+++ b/rtcore.h
@@ -304,6 +304,11 @@ RTC_API s8 ReadEntireFileS8(s8 path, arena *a);
 /* Write the given buffer to a file */
 RTC_API b32 WriteEntireFile(s8 path, byte *data, isize length);
 
+/* Retrieves a timestamp representing the last time of last modification.
+ * The interpretation of the returned value depends on the host system.
+ * If the operation fails, 0 is returned. */
+RTC_API i64 GetFileModificationTimestamp(s8 path);
+
 /* Atomics */
 #if !defined(RTC_NO_ATOMICS)
 	#if defined(__GNUC__) || defined(__clang__)
@@ -461,6 +466,7 @@ RTC_API THREAD_RETURN_TYPE JoinThread(thread *t);
 
 #ifdef __linux__
 	#include <pthread.h>
+	#include <sys/stat.h>
 #elif defined(_WIN32)
 	#define WIN32_LEAN_AND_MEAN
 	#include <windows.h>
@@ -750,6 +756,35 @@ WriteEntireFile(s8 path, byte *data, isize length)
 	return num == 1;
 }
 
+RTC_API
+i64 GetFileModificationTimestamp(s8 path)
+{
+	char _p[260];
+	if (path.length >= CountOf(_p))
+		return 0;
+	memcpy(_p, path.data, path.length);
+	_p[path.length] = '\0';
+#ifdef __linux__
+	struct stat st;
+	if (stat(_p, &st) != 0)
+		return 0;
+	#if _POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700
+	/* Nanosecond precision */
+	return (i64)st.st_mtim.tv_nsec;
+	#else
+	return (i64)st.st_mtim;
+	#endif
+#elif defined(_WIN32)
+	WIN32_FILE_ATTRIBUTE_DATA data;
+	if (GetFileAttributesExA(_p, GetFileExInfoStandard, &data) == 0)
+		return 0;
+	ULARGE_INTEGER u;
+	u.u.LowPart = data.ftLastWriteTime.dwLowDateTime;
+	u.u.HighPart = data.ftLastWriteTime.dwHighDateTime;
+	return (i64)u.QuadPart;
+#endif
+}
+
 /* Threading */
 #ifdef __linux__
 RTC_API thread *
diff --git a/rtcore_test.c b/rtcore_test.c
index a339d6f..316cdf5 100644
--- a/rtcore_test.c
+++ b/rtcore_test.c
@@ -68,6 +68,14 @@ TEST(ParseIntTest)
 	AssertFalse(testing, S8ParseI32(S8("Not a number"), 10).ok);
 }
 
+internal
+TEST(FileTimestampsTest)
+{
+	NoSuite;
+	i64 ts = GetFileModificationTimestamp(S8("somedata.txt"));
+	AssertNotEqual(testing, ts, 0);
+}
+
 int
 main(int argc, char **argv)
 {
@@ -78,5 +86,6 @@ main(int argc, char **argv)
 	RegisterStandaloneTest(testing, ReadFileTest);
 	RegisterStandaloneTest(testing, ThreadTest);
 	RegisterStandaloneTest(testing, ParseIntTest);
+	RegisterStandaloneTest(testing, FileTimestampsTest);
 	return ExecuteTests(testing, argc, argv) ? 0 : 1;
 }