diff --git a/src/main/c/Android/jni/SerialPort_Android.c b/src/main/c/Android/jni/SerialPort_Android.c
index c86d727..bf1cec9 100644
--- a/src/main/c/Android/jni/SerialPort_Android.c
+++ b/src/main/c/Android/jni/SerialPort_Android.c
@@ -2,7 +2,7 @@
  * SerialPort_Android.c
  *
  *       Created on:  Mar 13, 2015
- *  Last Updated on:  Mar 07, 2019
+ *  Last Updated on:  Apr 15, 2019
  *           Author:  Will Hedgecock
  *
  * Copyright (C) 2012-2019 Fazecast, Inc.
@@ -668,7 +668,7 @@ JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getDSR(JNIEn
 	if (serialPortFD <= 0)
 		return JNI_FALSE;
 	int modemBits = 0;
-	return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_LE);
+	return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_DSR);
 }
 
 JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getDCD(JNIEnv *env, jobject obj, jlong serialPortFD)
diff --git a/src/main/c/Posix/SerialPort_Posix.c b/src/main/c/Posix/SerialPort_Posix.c
index f83cc55..72693e5 100644
--- a/src/main/c/Posix/SerialPort_Posix.c
+++ b/src/main/c/Posix/SerialPort_Posix.c
@@ -2,7 +2,7 @@
  * SerialPort_Posix.c
  *
  *       Created on:  Feb 25, 2012
- *  Last Updated on:  Mar 07, 2019
+ *  Last Updated on:  Apr 15, 2019
  *           Author:  Will Hedgecock
  *
  * Copyright (C) 2012-2019 Fazecast, Inc.
@@ -791,7 +791,7 @@ JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getDSR(JNIEn
 	if (serialPortFD <= 0)
 		return JNI_FALSE;
 	int modemBits = 0;
-	return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_LE);
+	return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_DSR);
 }
 
 JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getDCD(JNIEnv *env, jobject obj, jlong serialPortFD)
diff --git a/src/main/resources/Android/arm64-v8a/libjSerialComm.so b/src/main/resources/Android/arm64-v8a/libjSerialComm.so
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diff --git a/src/main/resources/Android/armeabi-v7a/libjSerialComm.so b/src/main/resources/Android/armeabi-v7a/libjSerialComm.so
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diff --git a/src/main/resources/Linux/armv5/libjSerialComm.so b/src/main/resources/Linux/armv5/libjSerialComm.so
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diff --git a/src/main/resources/Linux/armv8_32/libjSerialComm.so b/src/main/resources/Linux/armv8_32/libjSerialComm.so
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diff --git a/src/main/resources/OSX/x86_64/libjSerialComm.jnilib b/src/main/resources/OSX/x86_64/libjSerialComm.jnilib
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diff --git a/src/main/resources/Solaris/sparcv8plus_32/libjSerialComm.so b/src/main/resources/Solaris/sparcv8plus_32/libjSerialComm.so
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