diff --git a/Makefile b/Makefile
index 57355ba..dfb4db3 100644
--- a/Makefile
+++ b/Makefile
@@ -103,7 +103,7 @@ ifeq ($(STATIC_LINKING), 1)
     EXT := a
 endif
 
-LIBM		= -lm -lpthread
+LIBM		= -lpthread
 CC_AS ?= $(CC)
 
 LDFLAGS += -Wl,--as-needed
@@ -123,15 +123,15 @@ DEFINES := $(PLATFORM_DEFINES) -DEXCLUDE_SOUND_LIBS -DEP128EMU_LIBRETRO_CORE
 # DEFINES += -DEP128EMU_USE_XRGB8888
 
 CFLAGS += $(DEFINES)
-CXXFLAGS += $(DEFINES) -std=c++2a
+CXXFLAGS += $(DEFINES) -std=c++0x
 
 include Makefile.common
 
 INCLUDES := $(INCFLAGS)
 OBJECTS := $(SOURCES_CPP:.cpp=.o)
 OBJECTS += $(SOURCES_C:.c=.o)
-CFLAGS += -Wall -pedantic $(fpic)
-CXXFLAGS += -Wall -pedantic $(fpic)
+CFLAGS += -Wall $(fpic)
+CXXFLAGS += -Wall $(fpic)
 
 all Release: $(TARGET)
 
diff --git a/core/main.cpp b/core/main.cpp
index dcf4a11..a1d1f16 100644
--- a/core/main.cpp
+++ b/core/main.cpp
@@ -57,7 +57,7 @@ EP Mouse support
 #include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
-#include <math.h>
+//#include <math.h>
 #include <algorithm>
 
 #include "ep128vm.hpp"
@@ -363,7 +363,7 @@ void retro_get_system_info(struct retro_system_info *info)
 {
   memset(info, 0, sizeof(*info));
   info->library_name     = "ep128emu";
-  info->library_version  = "v0.90";
+  info->library_version  = "v0.91";
   info->need_fullpath    = true;
   info->valid_extensions = "img|dsk|tap|dtf|com|trn|128|bas|cas|cdt|tzx|.";
 }