diff --git a/core/Makefile b/core/Makefile
index 2c1e37c1..49a02bc1 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -39,7 +39,7 @@ OBJECTS_C = zlib/adler32.c zlib/compress.c zlib/crc32.c zlib/deflate.c zlib/gzio
 	   zlib/infback.c zlib/inffast.c zlib/inflate.c zlib/inftrees.c zlib/trees.c \
 	   zlib/uncompr.c zlib/zutil.c
 
-LINK = $(HL2LIB)/tier1_i486.a $(HL2LIB)/mathlib_i486.a vstdlib_i486.so tier0_i486.so -static-libgcc
+LINK = $(HL2LIB)/tier1_i486.a $(HL2LIB)/mathlib_i486.a vstdlib_i486.so tier0_i486.so -lpthread -static-libgcc
 
 INCLUDE = -I. -I.. -I$(HL2PUB) -I$(HL2PUB)/dlls -I$(HL2PUB)/engine -I$(HL2PUB)/tier0 -I$(HL2PUB)/tier1 \
           -I$(HL2PUB)/vstdlib -I$(HL2SDK)/tier1 -I$(SMM_TRUNK) -I$(SMM_TRUNK)/sourcehook -I$(SMM_TRUNK)/sourcemm \