diff --git a/miniasm.spec b/miniasm.spec
index 69ff8e6..dcb0e78 100644
--- a/miniasm.spec
+++ b/miniasm.spec
@@ -8,7 +8,7 @@ License: MIT
 URL:	 https://github.com/lh3/miniasm
 Source0: https://github.com/lh3/miniasm/archive/%{name}-%{version}.tar.gz
 
-BuildRequires: 	gcc
+BuildRequires: 	gcc zlib-devel
 
 %description
 Miniasm is a very fast OLC-based de novo assembler for noisy long reads. It takes all-vs-all read self-mappings (typically by minimap) as input and outputs an assembly graph in the GFA format. Different from mainstream assemblers, miniasm does not have a consensus step. It simply concatenates pieces of read sequences to generate the final unitig sequences. Thus the per-base error rate is similar to the raw input reads.