diff --git a/Makefile b/Makefile
index d215cb3..b4b4a68 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@
 include $(CLEAR_VARS)
 
 
-COMPILER_FLAGS		=	-Wall -O3 -I/usr/include/opus -I/usr/include/openssl -Ilibtgvoip/webrtc_dsp -c -std=c++11 -fpic -DANDROID -finline-functions -ffast-math -Os -fno-strict-aliasing -DUSE_KISS_FFT -DFIXED_POINT -DTGVOIP_USE_CUSTOM_CRYPTO -DPHP_LIBTGVOIP -DWEBRTC_POSIX -DTGVOIP_USE_DESKTOP_DSP -o
+COMPILER_FLAGS		=	-Wall -O0 -I/usr/include/opus -I/usr/include/openssl/ -Ilibtgvoip/webrtc_dsp -c -std=c++11 -fpic -DANDROID -finline-functions -ffast-math -Os -fno-strict-aliasing -DUSE_KISS_FFT -DFIXED_POINT -DPHP_LIBTGVOIP -DWEBRTC_POSIX -DTGVOIP_USE_DESKTOP_DSP -g -o
 #COMPILER_FLAGS      =   -Wall -c -O2 -std=c++11 -fpic -I/usr/include/opus -o
 LINKER_FLAGS		=	-shared
 LINKER_DEPENDENCIES	=	-lphpcpp -I/usr/include/opus
diff --git a/README.md b/README.md
index 81230d5..0fdc6a7 100644
--- a/README.md
+++ b/README.md
@@ -4,5 +4,7 @@ WIP
 
 This is a PHP extension that wraps the [telegram VoIP library](https://github.com/grishka/libtgvoip), created using php-cpp.
 
+This library requires the libopus headers, openssl headers (OpenSSL_1_0_1-stable) and the php-cpp headers.
+
 It is licensed under AGPLV3.
 
diff --git a/main.cpp b/main.cpp
index f9ce581..bcf81c4 100644
--- a/main.cpp
+++ b/main.cpp
@@ -70,8 +70,9 @@ public:
         inst->Connect();
     }
     void setEncryptionKey(Php::Parameters &params) {
-        char *key = strdup(params[0]);
-        inst->SetEncryptionKey(key, params[1]);
+        char key[256];
+        memcpy(key, (const char *) params[0], 256);
+        inst->SetEncryptionKey(key, (bool) params[1]);
         free(key);
     }