diff --git a/audio/AudioHardwareInterface.cpp b/audio/AudioHardwareInterface.cpp
index dbf6f33..47fd74e 100644
--- a/audio/AudioHardwareInterface.cpp
+++ b/audio/AudioHardwareInterface.cpp
@@ -143,7 +143,7 @@ status_t AudioHardwareBase::dumpState(int fd, const Vector<String16>& args)
     result.append(buffer);
     snprintf(buffer, SIZE, "\tmMode: %d\n", mMode);
     result.append(buffer);
-    ::write(fd, result.string(), result.size());
+    ::write(fd, result.c_str(), result.size());
     dump(fd, args);  // Dump the state of the concrete child.
     return NO_ERROR;
 }
diff --git a/audio/audio_hw_hal.cpp b/audio/audio_hw_hal.cpp
index 6ea05fd..ba27285 100644
--- a/audio/audio_hw_hal.cpp
+++ b/audio/audio_hw_hal.cpp
@@ -216,7 +216,7 @@ static char * out_get_parameters(const struct audio_stream *stream, const char *
         s8 = parms.toString();
     }
 
-    return strdup(s8.string());
+    return strdup(s8.c_str());
 }
 
 static uint32_t out_get_latency(const struct audio_stream_out *stream)
@@ -367,7 +367,7 @@ static char * in_get_parameters(const struct audio_stream *stream,
         s8 = parms.toString();
     }
 
-    return strdup(s8.string());
+    return strdup(s8.c_str());
 }
 
 static int in_set_gain(struct audio_stream_in *stream, float gain)
@@ -474,7 +474,7 @@ static char * adev_get_parameters(const struct audio_hw_device *dev,
     String8 s8;
 
     s8 = ladev->hwif->getParameters(String8(keys));
-    return strdup(s8.string());
+    return strdup(s8.c_str());
 }
 
 static size_t adev_get_input_buffer_size(const struct audio_hw_device *dev,