diff --git a/media/libmedia/MediaScanner.cpp b/media/libmedia/MediaScanner.cpp
index 24426ff..ba98f04 100644
--- a/media/libmedia/MediaScanner.cpp
+++ b/media/libmedia/MediaScanner.cpp
@@ -81,13 +81,13 @@
 }
 
 static bool fileMatchesExtension(const char* path, const char* extensions) {
-    char* extension = strrchr(path, '.');
+    const char* extension = strrchr(path, '.');
     if (!extension) return false;
     ++extension;    // skip the dot
     if (extension[0] == 0) return false;
 
     while (extensions[0]) {
-        char* comma = strchr(extensions, ',');
+        const char* comma = strchr(extensions, ',');
         size_t length = (comma ? comma - extensions : strlen(extensions));
         if (length == strlen(extension) && strncasecmp(extension, extensions, length) == 0) return true;
         extensions += length;
diff --git a/media/libstagefright/NuHTTPDataSource.cpp b/media/libstagefright/NuHTTPDataSource.cpp
index ab9285d..332bab3 100644
--- a/media/libstagefright/NuHTTPDataSource.cpp
+++ b/media/libstagefright/NuHTTPDataSource.cpp
@@ -42,7 +42,7 @@
         path->setTo(slashPos);
     }
 
-    char *colonPos = strchr(host->string(), ':');
+    const char *colonPos = strchr(host->string(), ':');
 
     if (colonPos != NULL) {
         unsigned long x;
diff --git a/media/libstagefright/httplive/M3UParser.cpp b/media/libstagefright/httplive/M3UParser.cpp
index edd8648..17771c4 100644
--- a/media/libstagefright/httplive/M3UParser.cpp
+++ b/media/libstagefright/httplive/M3UParser.cpp
@@ -90,7 +90,7 @@
         out->setTo(baseURL);
         out->append(url);
     } else {
-        char *slashPos = strrchr(baseURL, '/');
+        const char *slashPos = strrchr(baseURL, '/');
 
         if (slashPos > &baseURL[6]) {
             out->setTo(baseURL, slashPos - baseURL);
diff --git a/media/libstagefright/rtsp/ARTSPConnection.cpp b/media/libstagefright/rtsp/ARTSPConnection.cpp
index e9162c0..9826990 100644
--- a/media/libstagefright/rtsp/ARTSPConnection.cpp
+++ b/media/libstagefright/rtsp/ARTSPConnection.cpp
@@ -116,7 +116,7 @@
         path->setTo(slashPos);
     }
 
-    char *colonPos = strchr(host->c_str(), ':');
+    const char *colonPos = strchr(host->c_str(), ':');
 
     if (colonPos != NULL) {
         unsigned long x;
diff --git a/media/libstagefright/rtsp/ASessionDescription.cpp b/media/libstagefright/rtsp/ASessionDescription.cpp
index ca4c55e..25b9ce2 100644
--- a/media/libstagefright/rtsp/ASessionDescription.cpp
+++ b/media/libstagefright/rtsp/ASessionDescription.cpp
@@ -164,7 +164,7 @@
     AString format;
     getFormat(index, &format);
 
-    char *lastSpacePos = strrchr(format.c_str(), ' ');
+    const char *lastSpacePos = strrchr(format.c_str(), ' ');
     CHECK(lastSpacePos != NULL);
 
     char *end;
diff --git a/media/libstagefright/rtsp/MyHandler.h b/media/libstagefright/rtsp/MyHandler.h
index 74bb798..719ebf3 100644
--- a/media/libstagefright/rtsp/MyHandler.h
+++ b/media/libstagefright/rtsp/MyHandler.h
@@ -419,7 +419,7 @@
             out->setTo(baseURL);
             out->append(url);
         } else {
-            char *slashPos = strrchr(baseURL, '/');
+            const char *slashPos = strrchr(baseURL, '/');
 
             if (slashPos > &baseURL[6]) {
                 out->setTo(baseURL, slashPos - baseURL);