diff --git a/Makefile b/Makefile
index 9b65601..193c96d 100644
--- a/Makefile
+++ b/Makefile
@@ -37,8 +37,8 @@ imgs/%-avg_pwr-highres.webp: logs/%.csv
 # Targets to re-build images from xz-ed logs
 
 SRCS_XZ:=$(wildcard logs/*.csv.xz)
-IMGS1_XZ:=$(patsubst %.csv, %-avg_pwr-fromxz.webp, $(SRCS_XZ))
-IMGS2_XZ:=$(patsubst %.csv, %-peak-fromxz.webp, $(SRCS_XZ))
+IMGS1_XZ:=$(patsubst %.csv.xz, %-avg_pwr-fromxz.webp, $(SRCS_XZ))
+IMGS2_XZ:=$(patsubst %.csv.xz, %-peak-fromxz.webp, $(SRCS_XZ))
 IMGS_XZ:=$(patsubst logs/%, imgs/%, $(IMGS1_XZ) $(IMGS2_XZ))
 
 .PHONY: from_xz