diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 988d15ac4e..2d3cbe6083 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -494,8 +494,8 @@ install-headers:
 	mkdir -p "$(prefix)/include/ffmpeg"
 	install -m 644 $(SRC_PATH)/libavcodec/avcodec.h \
                 "$(prefix)/include/ffmpeg"
-	install -d $(libdir)/pkgconfig
-	install -m 644 ../libavcodec.pc $(libdir)/pkgconfig
+	install -d "$(libdir)/pkgconfig"
+	install -m 644 ../libavcodec.pc "$(libdir)/pkgconfig"
 
 #
 # include dependency files if they exist
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 65d878116c..d4643cb717 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -130,8 +130,8 @@ install-headers:
                 $(SRC_PATH)/libavformat/rtp.h $(SRC_PATH)/libavformat/rtsp.h \
                 $(SRC_PATH)/libavformat/rtspcodes.h \
                 "$(prefix)/include/ffmpeg"
-	install -d $(libdir)/pkgconfig
-	install -m 644 ../libavformat.pc $(libdir)/pkgconfig
+	install -d "$(libdir)/pkgconfig"
+	install -m 644 ../libavformat.pc "$(libdir)/pkgconfig"
 
 %.o: %.c
 	$(CC) $(CFLAGS) $(LIBOBJFLAGS) -c -o $@ $< 
diff --git a/libavutil/Makefile b/libavutil/Makefile
index 6765cc7ea1..4308cd09fd 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -84,8 +84,8 @@ install-headers:
 	               $(SRC_PATH)/libavutil/rational.h \
 	               $(SRC_PATH)/libavutil/intfloat_readwrite.h \
                 "$(prefix)/include/ffmpeg"
-	install -d $(libdir)/pkgconfig
-	install -m 644 ../libavutil.pc $(libdir)/pkgconfig
+	install -d "$(libdir)/pkgconfig"
+	install -m 644 ../libavutil.pc "$(libdir)/pkgconfig"
 
 #
 # include dependency files if they exist