diff --git a/code/makefile b/code/makefile
index 76ee357cb..00b641c7a 100644
--- a/code/makefile
+++ b/code/makefile
@@ -26,6 +26,7 @@ OBJECTS   += $(patsubst %.cpp,%.o,  $(wildcard ./../contrib/irrXML/*.cpp))
 # C object files
 OBJECTSC  := $(patsubst %.c,%.oc,   $(wildcard ./../contrib/zlib/*.c))
 OBJECTSC  += $(patsubst %.c,%.oc,   $(wildcard ./../contrib/ConvertUTF/*.c))
+OBJECTSC  += $(patsubst %.c,%.oc,   $(wildcard ./../contrib/unzip/*.c))
 
 # Directory for install
 INSTALLDIR = /usr/bin/assimp
diff --git a/code/makefile.mingw b/code/makefile.mingw
index f1cd624af..e3fb16655 100644
--- a/code/makefile.mingw
+++ b/code/makefile.mingw
@@ -28,6 +28,7 @@ OBJECTS   += $(patsubst %.cpp,%.o,  $(wildcard ./../contrib/irrXML/*.cpp))
 # C object files 
 OBJECTSC  := $(patsubst %.c,%.oc,   $(wildcard ./../contrib/zlib/*.c))
 OBJECTSC  += $(patsubst %.c,%.oc,   $(wildcard ./../contrib/ConvertUTF/*.c))
+OBJECTSC  += $(patsubst %.c,%.oc,   $(wildcard ./../contrib/unzip/*.c))
 
 # Include flags for gcc
 INCLUDEFLAGS =