diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index fa5948ded..a1f752ed7 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -232,7 +232,7 @@ set(SRB2_CONFIG_HAVE_GME ON CACHE BOOL
 set(SRB2_CONFIG_HAVE_OPENMPT ON CACHE BOOL
 	"Enable OpenMPT support.")
 set(SRB2_CONFIG_HAVE_CURL ON CACHE BOOL
-	"Enable curl support, used for downloading files via HTTP.")
+	"Enable curl support.")
 set(SRB2_CONFIG_HAVE_THREADS ON CACHE BOOL
 	"Enable multithreading support.")
 if(${CMAKE_SYSTEM} MATCHES Windows)
@@ -458,7 +458,7 @@ endif()
 if(${SRB2_CONFIG_HAVE_CURL})
 	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
 		set(CURL_FOUND ON)
-		set(CURL_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/curl)
+		set(CURL_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/curl/include)
 		if(${SRB2_SYSTEM_BITS} EQUAL 64)
 			set(CURL_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/curl/lib64 -lcurl")
 		else() # 32-bit
@@ -552,6 +552,7 @@ if(${SRB2_CONFIG_USEASM})
 	endif()
 	set(SRB2_USEASM ON)
 	add_definitions(-DUSEASM)
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse3 -mfpmath=sse")
 else()
 	set(SRB2_USEASM OFF)
 	add_definitions(-DNONX86 -DNORUSEASM)
diff --git a/src/Makefile b/src/Makefile
index 8ad7ecf5a..da918e205 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -277,7 +277,7 @@ OPTS += -DCOMPVERSION
 
 ifndef NONX86
 ifndef GCC29
-	ARCHOPTS?=-march=pentium
+	ARCHOPTS?=-msse3 -mfpmath=sse
 else
 	ARCHOPTS?=-mpentium
 endif
diff --git a/src/sdl/CMakeLists.txt b/src/sdl/CMakeLists.txt
index bb5edf817..a7f015c86 100644
--- a/src/sdl/CMakeLists.txt
+++ b/src/sdl/CMakeLists.txt
@@ -272,7 +272,7 @@ if(${SDL2_FOUND})
 	endif()
 
 	target_compile_definitions(SRB2SDL2 PRIVATE
-		-DDDIRECTFULLSCREEN -DHAVE_SDL
+		-DDIRECTFULLSCREEN -DHAVE_SDL
 	)
 
 	## strip debug symbols into separate file when using gcc.