diff --git a/Makefile b/Makefile
index 65b52f6ca..5d6d6c072 100644
--- a/Makefile
+++ b/Makefile
@@ -31,8 +31,8 @@ LDABSL=$(shell $(PKG_CONFIG) $(ABSL_DEPS) --libs | sed -e 's/-Wl / /g')
 
 # Build against GoogleTest and Benchmark for... testing and benchmarking.
 # Capture only the `-L` flags for now; we will pass the `-l` flags later.
-CCGTEST=$(shell $(PKG_CONFIG) gtest --cflags)
-LDGTEST=$(shell $(PKG_CONFIG) gtest --libs-only-L)
+CCGTEST=$(shell $(PKG_CONFIG) gtest gtest_main --cflags)
+LDGTEST=$(shell $(PKG_CONFIG) gtest gtest_main --libs-only-L)
 CCBENCHMARK=$(shell $(PKG_CONFIG) benchmark --cflags)
 LDBENCHMARK=$(shell $(PKG_CONFIG) benchmark --libs-only-L)